My last one lasted probably for six months ( I wasn't on any meds then) and it was hell. I hated it. I was so depressed but sped up and chatty enough that everyone thought I was hilarious.
Anyway, I basically became a drunk, booked a one way ticket to Asia, crashed hard and moved to aus where I finally got myself diagnosed.
I think sodium valproate is meant to be good for mixed / rapid cycling. Works for me