A.S.
For what it's worth one of my really close friends had a baby in college. She was able to stay in school and get her degree. She found an apartment on campus, and still went to school every day. So, being pregnant and having a kid are not reasons to say "it's out the window." It can be done, and has been done by many women.
I do think though that you should probably relax and not make any demands about meeting the father's family and what not. Even though you are going to be providing a lot of support, you are still the grandma, not the parent. Being too demanding and aggressive about all this will only push your daughter away. You have to give her room to let her grow up, you have to trust her and give her the space to make her own decisions.
Just be there for her, love her and give her your support, that's all she needs. Congratulations!