Well, the first thing to do is to take a home pregnancy test. If you aren't pregnant, the second thing is to stop having unprotected sex.
It does sound like you are pregnant, however. I don't think the DCF just "takes your baby," my guess would be if your family (mom or grandma) can make a good case to them for custody or for you having custody in their care, it's not in the interests of the state to take a baby away from its blood relatives no matter how young the mom. Only if there is no way for the mom to take care of the child.
Anyway, first things first. Go to the Dollar Store and get a pregnancy test, and see if you are pregnant.
I'm sorry to hear about the rough times with your dad and dcf. Life can be really hard sometimes.
Agree that you need to go ahead and take a pregnancy test. You can get an at home pregnancy test at any grocery, drug, convenience or super store. OR if you life in the United States, look up "Planned Parenthood" and see if there is a location near you and see if you can get a ride there. They take cash and charge the minimal amount. Good place to talk about birth control too if you aren't pregnant.
Please let us know how you are doing.