Pregnant Again..MAYBE

Okay so long story short, I'm 17 with a 2 year old son. I just started dating my boy bestfriend 2 months ago. We had sex once and I am having symptoms of pregnancy. I'm nausea, throwing up, peeing a lot, sleeping like crazy and eating everything. I feel like I am indeed pregnant and because I been through this before I am trusting my gut feeling. I don't believe in abortions and I just got a full ride to a college because of my 3.85 GPA. What do I do?