Hello sweetie,
I'm in a similar situation to you: finding the first few weeks of uni almost unberable due to panic attacks. Like you I'm also reluctant to let my parents know that I'm struggling. I've found that several things can help:
1. A routine. This was hard for me at first because I come from a family where everything is very structured: there are set mealtimes and bedtimes and my Grandma is always there to get me out of bed on a morning and make sure I don't accidentally sleep in! But honestly, a solid routine will really help to focus your mind so there's less idle time where you can just lay on your bed and cry. As part of this, joining a society that meets every week or going to a fitness class might help. If the gym isn't your thing, there are less intimidating options like yoga. The endorphins released from excercise are a brilliant antidote to depression and anxiety. I feel really self conscious about excercise int in public so I like to go for a run around the back streets at night time so I don't bump into anyone, but my uni is in a location that makes this possible- don't put yourself in any danger!! I know the idea of joining a society or a fitness class may be very daunting at first, but sometimes you've just got to pluck up the courage and do it- you can't continue in the state that you're in. If you go and don't like it, fine! Don't go again. If you go and make a fool of yourself, again that's fine! University is a big place and chances are you'll never see those people again. In reality, you'll more than likely meet with people who share similar interests and are more 'on the same wavelength' to you than your housemates are.
Just for the record- my housemates are awful and all they ever talk about is sex!!
2. You must try and eat regular meals- feeling hungry will only lower your mood and make you feel worse. Why not try preparing your meals in advance or cooking in the kitchen early in the morning/late at night when the rest of your housemates are in bed? Try to avoid caffeine it you can: Morrissons sells excellent decaf tea... and you can get 10% off all food there with your UNIDAYS ID!
3. Get in touch with your GP, they can prescribe anti-anxiety medication and complimentary therapies. Some people are very anti-medication but in my experience it really has helped, I struggle to function properly when I haven't taken my Sertraline! If the prescription charge is off putting then they can point you in th direction of financial support from the NHS.
As part of this, contact your university counselling service. They're used to seeing students in your position and can offer advice and a sympathetic ear so you're not worried about burdening your parents. Get in quick before the waiting list starts to fill up! In addition, the accessibility/disability department may be able to help by giving you a bursary/ a separate room to sit your exams in/ a seat in lectures near the exit and the like. Please don't worry about not being 'diagnosed' with anxiety. There's not really much of a formal diagnosis procedure anyway (Or at least there wasn't in my case). If you're struggling with your mental help then you're entitled to support: there is no such thing as 'faking it'. You're not the first student to struggle and you won't be the last!
4. Try mindfulness. If you haven't heard of it before, it's a type of non religious meditation. There are various different apps (Headspace is a good one- they initially have a free trial and then you can pay something like £30 for the whole year via Anxiety UK's student concessionary rates. The disability service may also be able to give you money towards this) and YouTube videos to guide you through the process of relaxing and breathing. At first I was very sceptical of mindfulness but it has really helped me!
5. Sleep is important. Try to get just the right amount- not too much or too little- by relaxing before bed. Have a warm shower (or a bath if you're lucky enough to have one in your halls!!!!) with some lavender scented soap then get nice and warm under your duvet with a blanket or a teddy from home. Some people swear by chamomile tea but I hate the taste!!!
6. Masturbation. I won't go into too much detail, but it's a factor which is often overlooked in tackling anxiety. It's a great way to relax before bed and help you explore your body in a healthy way. If porn does it for you, then great! Most uni servers don't block it. If not, then go for whatever works for you! Just prepare for a massive rush of serotonin...
7. As a last resort, you could always swap halls if your housemates are that intolerable.
8. Finally, there's a wealth of other resources on the Internet: I find reading other people's experiences of anxiety and panic attacks strangely soothing so I know I'm not alone. Matt Haigh is amazing.
Things WILL get better for you soon, I promise. Until then I'll be sending you strength in my prayers tonight. xx