How do I get over my fear of being a mom?

I'm only 18 years old , and a few days ago I found out that I was pregnant. Of course , this is an unplanned pregnancy. I'm still in school , and won't graduate until I'm 19. I have never ever wanted to be a mother; I find pregnancy quite weird. The body changes, the human being growing in your stomach... it's all so weird for me. I would get an abortion but I don't have the money for one and my mom won't pay for it, so I pretty much have to deal with being a teen mom (a single one , unless the paternity test comes out positive; sheesh. I hate boys.) I more than likely will do homeschooling but I have absolutely no clue on how I am going to be a mother. I don't even know where to begin. No one is guiding me; I still don't even know how many weeks I am. I'm not ready for this; so what do I do? Any advice would be helpful .