Jealous of my pregnant friends

Lovely • Hubby & I are expecting our first baby. We couldn't be happier! EDD is March 16, 2016.
All my friends are popping up pregnant . We've been trying for a year but nothing. I'm in my early twenties and this sucks. I'm happy for them but I also feel a lot of jealousy. Hubby really wants a baby too. Every time AF comes I get so down. Anyone else feeling this way?