Hi Transform!
Oh, did I go through several large mood swings each day for a while when going through my divorce. My xH cheated on me and he initiated it, then stopped it, then wouldn't go to counseling, then I told him if he did not finish the divorce I would, then I panicked and cried for days......well, you get the picture.
I think what you are feeling is perfectly natural and normal. It helped me to acknowledge the feeling, then do what I could to let it pass by (journaling!).
HG