you sound like you really don't know what to do. I've been there lovely, it feels like an impossible situation and no-one could blame you for any choice you make right now.
I was 19 when I got pregnant, and just starting my second year of uni. I went and spoke to my lecturers, and they were incredibly supportive, they really couldn't have done more to help. I decided to carry on with the pregnancy and uni, and just take it one day at a time. If you decide to continue the pregnancy, I can't recommend this enough - it gives you time and space to clear your head, with the option of suspending your studies for a year later on.
As it was I was lucky and DD was born on the last day of the academic year - obviously I missed a few lessons at the end, but I was going into class right up until I went into hospital to give birth. It was difficult, I'm not going to sugar coat it, but the support of the lecturers and my classmates got me through. I passed 2nd year, had the summer with DD, and went back in the September for 3rd year.
As a student parent you can get extra student finance and help with childcare costs, this was a godsend because she went to the campus nursery so she wasn't too far away. Balancing studying and parenting is really, really difficult, but it's doable and so rewarding. After thinking I'd need to drop out when I found out I was pregnant, I finished my degree on time and with a First and the best grades in my class.
Does your uni have a student parent society? The majority will be mature students but there will be other young parents who can give you words of wisdom and support. I started a blog about it when I was going through it and I've now finished so my blog is on a bit of a different tangent, but I know of a couple of young parent bloggers who are currently students, if you're interested in reading their experiences.
You've made the right choice in asking for support on Mumsnet; they helped me when I was pregnant and had no idea what to do. I was considering adoption, but they explained to me that it wasn't as easy as just handing the baby over and there isn't much support for birth parents relinquishing a baby in the UK, which is why I'm always sceptical when that is touted as a good idea on these threads.
I think you need to see someone impartial in real life to talk it through with you. Your uni should have a counselling service where you can talk about it in confidence, and if you have supportive lecturers they make the absolute world of difference. Whatever decision you come to, you have to be comfortable with it - it's clear that right now, you're not comfortable with abortion, so please don't rush into anything.
If you want any advice or even just to vent, just PM me
I've been there x