Short answer, it never ends, but does take intermissions. A better question is when did it begin. I am constantly amazed at people recently diagnosed with BP and suddenly they are questioning themselves and everything. Nothing has changed except now you got a label. I went thru it too, as if one morning I woke up and became BP. It doesn't happen like that. Chances are it existed long before you were diagnosed. In my case I can not even say when it began because it seems my whole life including my childhood, was always a bit off. Try to relax, there will be good times and bad times, and boring times. Nothing has really changed except now we know why.