Happy accident maybe?

Feral
Ok, I am 19 years old. My (ex) fiance and I have been sexually active for a bit over a year always practicing safe sex. He and I recently had a huge fight because he was out driving alone with a girl at 4 am. He never came home that night or turned his phone on. The next afternoon he decided it would be best if we went out separate ways and didn't see each other any more. As upsetting as it was I was determined to stay positive and not let him drag me down. That's when the cramps started. It was near my expected period so I was relieved at first but I went about a week without bleeding. Online I found that slight cramping is a sign of early pregnancy. I took 4 clear blue digital pregnancy tests and all read positive. I've made an appointment with my gyno. What should I Do? The father wants nothing to do with me or the child and I'm very young and alone. Any advice?