Yeah, it sux when you do dumb stuff while manic. When I have the post manic " omg how humiliating I want the ground to eat me what was I thinking eww what have I done why did I say that" blues I try to put it in perspective.
I think if my friend did these things to me, and I could see in my friends head and see that they were sick, would I be mad at them. The answer is always no. Then I switch it and I'm like, well that was me, I did that, I was sick, I wouldn't hate a friend for it so I won't hate myself for it either.
Obviously Easier said than done, but that works for me for forcing myself to forgive myself, or a least not berate myself. I just repeat it in my mind whenever I start on the " I'm an awful person" tangent.
Hope that makes sense? I'm a little too relaxed on meds right now
Hope you fee better soon!