Hi Tree. I'm sorry for your health problems. I know it's hard dealing with depression and another health related problem at the same time. Don't get discouraged because of it. From what I've read, in most cases it disappears completely in 2-3 weeks. You must know better, since you have had it before.
You are stronger than you think, if you had the power to keep yourself together with all these stressors at the same time (including leading tutorials). Keep it in mind.