Beth,
Sorry this really stinks when it happens, I just keep telling myself it will pass, stay on the meds, keep the faith, and that helps me sometimes. Just talking to someone who "really" knows what I am feeling, is an enormous help.
But, if it doesn't pass, and I start to feel scared that I am really falling, I call my pdoc., knock on wood, I haven't had to call him. But I confess, I do get weepy days and some tearfull nights, when I put my head on the pillow to sleep, that is hard to deal with, especially when I really feel tired. The mind races, well, you know how this goes, but know we are all here, pm any of us, sometimes we can actually talk one another through low times, almost like walking and holding someone's hand.
Oh well, for me that's how I feel sometimes.
Beth, I am sending you warm wishes for better days, and positive energies.

Sincerely,
DE
((((((((((((((( Beth ))))))))))))))))