27 and pregnant:Abortion, Adoption, Keep it?

I just found out I was pregnant. I am 27, a college graduate, have a stable job that I only marginally like,have insurance, a retirement plan, and am engaged to a man I plan to marry in 2 years. Unfortunately, my fianc�e is 24 and still in college pursuing his undergraduate degree. He is full time student and doesn't have a job so that he can concentrate just on his studies. We have talked over our options but can't seem to reach an agreement. This was a very unplanned pregnancy and we were taking numerous precautions (birth control pills, condoms and ovulation counting all together) I am 27 and as someone hastily nearing 30, I am worried that it could be 3 or 4 more years before I am even able to try to have a child again. Infertility runs in my family and all my relatives have had some trouble with it. What if this is my only chance to have a child unassisted or my only chance to have a child at all? He was an abortion for the obvious reason but my thinking is that we are planning to get married anyway. We want a family. This is just happening a bit early. Any thoughts or opinions would be appreciated. Has anyone else run into the situation? I am 27 not 16. Is this really such a huge deal and something to be ashamed of? Please note that we have no other children (together or apart).