It's understandable (about the living together thing). I wouldn't want to live without my husband, especially if I'm having a baby.
I waited two years before starting college. I'm glad I did because right now, I'd probably be doing something I'm not really into now since what I wanted to do when I graduated high school has changed dramatically. I saved up money, got reliable transportation, thought hard about what I wanted to do, etc. I waited two years and I still changed my major from journalism to nursing! But the reason I suggested waiting is because if you charge ahead with school work and then you find out you can't handle it with your household duties and taking care of an infant, you risk not completing classes, bringing down your GPA, or any of those things that you don't want. Personally, I'd want to get into the groove of being a mother, get my child on a routine, and get settled with married life before throwing college into the mix. Believe or not, marriage is tough. Often, the first year is pure hell.
I am not raining on your parade, but you don't realize at all right now how stressful caring for an infant can be. YOUR infant, not someone else's. You don't get a break. Ever. However hard you think it will be at this point, I'll bet it's ten times harder than that. Having a baby directly affects your career. Women with children don't get the same opportunities as women who are childless. The trade-off is enough because you have a child that you love and care for for the rest of your life. But be realistic.