Is it me overreacting?
It would appear that this incident took place possibly 2 and a half years ago so I wouldn't exactly say you've overreacted but actually underreacted. I guessing you felt at the time that your father was possibly attempting to sexually abuse you or inappropriately touch you. Dependent on just how far it went and just how uncomfortable you felt should determine what action you'd like to rake now. I cannot advise you any further as there's very little to go on and dads out of the picture in jail, hence, you should be safe for the time being.
pit bulls bite
it may not have been his hand
You never know. But you are always a baby in the eyes of normal parents so in that case it's not weird but vibes never lie. Sleep with him again pretend to be sleep and see what he does...