My half brother raped me...?

My advice is to seek out counseling from a therapist AND planned parenthood. Both can help you regardless of your decision as to keeping the baby. You will undoubtedly get input from everyone you know, and most of it will be unsolicited. A third party with no emotional interest in the outcome will give you honest and unbiased information. A lawyer can help you extract child support even if the father is in jail plus you'll want to make sure the father gets no parental rights. Your mental and emotional health will have an impact on your physical health. If you've made a decision, then don't keep revisiting it but rather move on to the next task that the original decision created.