tired of being jealous...

my husband and I have been TTC for 7 months now. and I swear every time I get on fb someone is announcing they're pregnant. I know I should be happy but it hurts so bad we are trying and it's not happening but for people who aren't trying it's like bam they get what I want so bad. my husband's ex (his daughters mom) has my step daughter (who is 7) then a year ago had a baby and then had to have my step daughter tell us she is pregnant again. and when she was pregnant with the 1 year old she was on drugs and had to go to rehab for 3 months or they would have taken the baby from her and now she is pregnant again? how does that happen? or a girl I know who posted Sunday pictures of her drinking then Monday posted she is pregnant. I mean really?? this is killing me!!! I'm doing everything right and nothing.. sorry rant over..