9 months no baby.

I have three close friends. One just had a baby. Last week the other told me she's pregnant, today i find out the other is pregnant. Here i sit. Depressed. I'm happy for my friends but why am i the only one who can't get pregnant? I know 9 months isn't a long time....but I'm the only friend actually TRYING to get pregnant. WHY CANT I GET FUCKING PREGNANT????? :'(