Well, I'm not going to judge you at all because you are in a situation that needs a lot of thought. You know that you have three options, go through with it, have an abortion, or adoption. It really depends on you and what you beleive is right for you. You sound like a bright girl, so I'm sure whatever decision you make will be the right one.
Don't base your decision on the reaction of others because if you do decide to have this baby, you are going to be the one taking care of and raising it, no one else. If you decide to have an abortion, you will have to live with it, and no one else will probably even think about it. And if you go for adoption, again, that's something that you are going to have to deal with.
I suggest writing down the pros and cons of each option and going over it with you OH and you two come to a decision together. If you feel like the only thing that's really confusing you is your living situation and the reaction your father will have when he finds out, I honestly don't think that you should base your decision on that alone because no matter how mad he is at first, he won't stay mad forever and I'm sure he'll want to be a part of your child's/his grandchild's life. And there are so many services that are available for mothers etc. now a days, so finding a place to live, may not be as hard as it may seem right now.
My mother is a very strict lady as well and I was terrified of being pregnant because she always told me that she would put me out if I ever got pregnant. When I felt I was pregnant (didn't know for sure) I had my mind made up that I was going to have an abortion, just so my family wouldn't look down on me. My mom freaked out and continued to freak out throughout my pregnancy. She was VERY angry but, she has turned out to be my number one support system and she loves my daughter so much, and no, she didn't kick me out.
I don't want to make you feel as though you should choose one thing or another because only you know if you are able to handle any of these options. I wish you all the best and I hope that whatever you choose, it's the right choice for you. Goodluck hun.