Feeling alone

I just recently found out a childhood friend of mine is pregnant I'm super excited for her and already bought her some baby items. Well tonight I found out a very close friend of mine is pregnant. And they both know I'm struggling to get pregnant with my husband. (I was recently diagnosed with endometriosis) and I've been told years before that, having children would be very hard. I'm just feeling very depressed and upset because I have pregnant envy. Any tips on how to get over this?