I think it may be very important for you to go talk to someone - counselor, friend, psychiatrist. It also may be time to try some medication again - I know some people like to try and manage without, but I'm a firm believer of laying a good solid (medication) foundation and then working your way up.
I know this will sound harsh - but screw your dad, for now anyway. You need to concentrate on you - you can deal with him later. I went through very similar feelings a year or so ago and I can't tell you how much better I feel now - but I had to work at it. Moving, starting a new job are both very stressful events in your life. And though family is awesome - sometimes they can cause negative feelings to come to the surface.
I went to a Naturopath a while ago, and she gave me this advice, "Don't believe your thoughts" - it sounds pretty silly, but it's very useful. Thinking too much is horrid for a depressed person - I think it's because we have such wonderful imaginations
Anyway, good luck and know that you felt good before and you will feel good again.
taisha