Don't feel bad, I think lots of pg women feel that way, when they have a unplanned pregnancy. You are young and have your whole life ahead of you. There are so many things out there for you to experience. You do have a choice, and I am talking about adoption. There are people who would love to adopt your twins and that would give them a great home. But you could too I am sure, can. You will have to give up somethings but many teens have done it. I was 23 years old but probably 17-19 maturity wise, when I had my son, it was hard but I did it. With the help of my parents.
You need to do what is best for you, and right now your feelings are going to be mixed up... Your pg, it happens. Your mom may need time, give it to her. Remember your her baby and she had plans and dreams for you! You can still make those dreams come true, but they may be done through a different route. I am glad your father and you are closer. How are you and your bf. Is he scared? So what is the advice you are asking about, if this does not help? Good luck and remember take