HI there,

I have not yet found a trigger, but I do realise I seem to be worse at work than when I am at home with my significant other. I also mainly experience BAD depression, depression or neutral (Stable) without the manic phase. I am also new to the diagnosis and have only recently started mood-stabilisers on top of anti-anxiety and anti-depression medication. So I cannot comment on how effective they are for me yet.
But it sounds as if you are going through a lot in your life, and I would suggest regular therapy to help you get your feelings out in a neutral territory and to help you manage them.