For me one of the biggest issues was judgement and seeking out support.
I had my boyfriend with me so loneliness wasn't a big issue, I was lucky enough to have great care through private insurance so the NHS mental health system didn't matter to me, work and things were an issue yeah, but not as bad as the fear I had for being judged over it and my difficulty with seeking (and receiving) support.
So basically here I am at uni doing a course I really love and am intellectually capable of, but the commitments involved like going to lectures and placements were a big deal for me. I could tell that I had judgement coming my way, but I tried my best to ignore it and to keep pushing on. I was getting more and more worn down and a burst of infections messed me up completely. For a good while I was managing to drag myself the the few lectures a week I had, but when I got home I would totally crash and sleep the whole time even needing my boyfriend to cook for me and wake me up to eat. Things were not great.
From the outside though I guess I just seemed unorganized and lazy. A lot of the time it was just the feeling that I was being judged for it, but there were also times it was a lot more obvious.
One of the worst moments for this was when I managed to be like an hour late for a lecture. I had tonsillitis at the time (a big deal when you're already running on empty all the time) so I was really not with it. Our lecture time had been changed or something and first off I got the time off by a half hour. After that I managed to completely blank what room it was (not a room I'd been to before and I had lost whatever I wrote it down on). I wandered the building for ages before eventually giving in and texting one of the girls on my course to ask for help. That was awful for me.
Also had some pretty substantial issues (like formal report to uni) cos a girl on my course obviously wasn't a fan of mine. I am absolutely terrible at remembering specific facts. Things like dates, names, titles etc are a real weakness of mine. I needed to email my course leader to get an extension on some work (which was part of my DSA agreement), but there was a problem- I didn't know their name. I had to ask on my course fb group cos searching on the uni website really wasn't an option at the time. That invited some not so pleasant responses from one person who seemed to think it was their job to put me in my place.
That only got worse when I had the audacity to go to the front of the room when I was late to a lecture so I could explain that my house had a potential gas leak so I needed to wait for the emergency gas people to come drill a hole in the wall and dig up the street. That clearly didn't sit well with miss chat a lot.
So yeah with all that stuff and the quite obvious casual judgement I really wasn't so keen on opening up about my struggles. It really fed into that vulnerable mental state of mine and caused a big mess for me. I didn't really have any decent reason or excuse for things then so I was stuck with hiding or being seen as lazy or whatever.