New babies

I recently had my 4th miscarriage in just over a year .. All my girlfriends are now pregnant or having babies & as much as I'm super excited for them I feel so jealous .. I wanted to start trying as soon as I could after this miscarriage but due to other medical problems I will have to wait .. I feel so lost .. Has anyone else felt this way ? I almost feel like some of these people don't " deserve " to have a baby .. As much as I'm excited for them , I feel like it's unfair .. I've been in a very stable relationship for a long time , recently bought a house , have a wonderful job .. But I guess that doesn't matter ..