Aww hugs for you. I hope you’re feeling better?
Drink lots of clear fluids / drink squash if you can’t tolerate water and rest for the next couple of days. Try and eat dry bland foods such as toast with / without butter. It can be a shock to the system going to a new city, and quite an intense experience. MH nursing is a tough challenge for anyone, so be kind to yourself. That’s my first bit of advice.
You may be experiencing an extreme reaction to your new surrounds - more likely you’re actually a bit under the weather. Covid is currently rife, so really it’s about listening to your body. Obvs if it is covid then stay at home. Try and attend lectures if you can rule out covid, but DO communicate with your course leader and make them aware if you’re not able to attend.
It will all pass. Speak with your family, make them aware. How far away are you from them? Can they visit you just to give you a hug?