Cycles, yes. What causes them, I do not know. I speculate that there is still a lot left over from childhood: a lot of expecting the worst. But it is becoming better, especially since I can live with or through the down feelings much more than I used to be able to. I accept them more, rather than trying to suppress them. That is, I had to hide the needy feelings in childhood in order to avoid more attacks. When I accept that I feel whatever I feel, and don't have to deny it as much, then it starts to get healed.