Hi Lola
While nobody here can diagnose you, it does sound like you are suffering. I think that regardless of the cause it sounds like you need some help right now to get through this time.
I do think that what you feeling right now is totally understandable with the re-emergence of your dad. This is heavy stuff.
I would strongly recommend that you find a counselor or therapist at this time to work through this issue. It is not going to go away. And I think you are overwhelmed in dealing with this on your own.
Please keep talking to us and let us know how things are going okay?