I'm really sorry this has happened to you. It sounds terrible and intense.

In regards to your time off from school, I too struggle to keep my mood stable when I have time off (which is crazy because I also have trouble working, but it's a different type of episode to manage). I usually become mixed very quickly when I have time off.

I haven't learnt to master it at all, but I think the most helpful thing would be to try to set yourself some kind of routine that has specific things built in that will make you feel like you have a purpose and stay connected with the "real world". To be honest I have never tried it, but that's how I imagine I would cope best, and having a solid routine is always credited with being excellent for bipolar management anyway.

For me I would be super specific. Eg. I would make a timetable of some sort that has Yoga 7:00-8:30pm Wednesdays, reading Psychology articles 9:00-10:00pm Wednesday's, etc. for me I think it is definitely the feeling of loss of routine that I struggle with. I doubt I would be able to follow such a timetable perfectly, but it would take away a lot of the uncertainty that makes me so anxious every day.