I do the same thing - like today I feel absolutely fine, and my posts are all about recovery and how good it is and so on....yet a month ago I was really low (which is when I found this forum).
If you're worried about "forgetting" how bad the crisis has been, write it down. Get a notebook/diary and write down things that are happening and how they make you feel. I always do best with my counsellor when I've done this. I do this at bedtime and put down anything that's happened that's made me feel good or bad, or anything that I've noticed that I would like to work on (e.g. feeling awkward in class because I didn't know what questions to ask). that way you've got a clear record of things bothering you day by day which you could quite easily forget about....until 5 minutes AFTER you've left the session of course
As for what you can do until you get to your counsellor, you're doing it. Read up what you can, maybe find a DBT skills workbook and try some of the exercises.....but put it away if you find it's making you feel worse rather than better. Keep telling yourself that you're doing the right thing, you WILL get medical help and you WILL start to feel better.
ANd keep posting on here if you find it helps....good luck