Hi,I'm 19 and gave birth to my daughter 2 weeks ago.
When I found out I was pregnant,I too was scared of not being able to cope with a baby.
I'm in university also and a single mom.
But whats most important here is taking one day at the time.Tell your parents,make sure you have their support in this and your boyfriend.I don't know much about your relationship and a baby definitely causes stress on even the strongest of couples but he needs to know and you need to know whether you can count on him even in the case of a breakup.
My daughters dad and I aren't together but he is there for both me and her,taking responsibility.
As much of a joy having a baby is,it's also unbeliveably hard and you seem like a responsible enough girl to know this and thats why I don't have much doubt that you will be able to cope.
There are a lot of girls on this forum in the same situation as you are,20,living with their parents and in university and they are currently 'enjoying'
in their first few wees of motherhood or last weeks of pregnancy...
You can go and browse though the single parents section and read their stories...
Good luck and congratulations on your pregnancy