I completely understand. I have been married for 3 years. Both my husband and I are college students, and we STILL get this kind of thing from some people (not close family luckily). Unfortunately, I don't know if we will be able to have children at all due to a recent health diagnosis and so I have no idea what to tell people when they ask, because really I don't feel like talking about the fact that I might not be able to have children with someone who is trying to pressure me like that...
Sorry to rant, but I know how you feel.