Suggest Treatment For Depression With Mood Swings

I am unsure if this needs to be within this specialty, but anyways here goes. I have trouble falling asleep, and when I finally do I get terrible dreams that wake me up and I try hard then not to fall asleep. I tend to hyper-imagine few scenarios (dealing majorly with ghosts and evil bits... ridiculous I know) and although I try hard not to focus on any such features, my mind tends to retain certain aspects and repeat them when I'm asleep. Other times I have dreams featuring my Dad in an intimate situation. This dream bothers me a LOT and I haven't been able to handle it at all. Apart from this I get many dreams featuring animals (dead turtles, owls caught in spiderwebs, Tigers/Lions chasing me, mean looking bulls wanting to talk to me, sleeping on top of a bear, bitten by snakes, rats... name it, I have dreamed it. And, yes I love animals... perhaps too emotionally). I'm 33, female, in a relationship with a married man. I probably am suffering from depression (not diagnosed but I suspect as much), I have violent mood-swings and sometimes I tend to contemplate suicide (I haven't attempted cause I have... responsibilities). I'm only looking for help with the dreams. I would prefer not to get any, even though some of them are fascinating. I most especially do not want to dream the one featuring my dad. Help, if at all possible.

Thanks much.