Getting resentful..

So I really just need to vent. My husband and I have been ttc #1 for four years, two with medication. I haven't gotten Af yet but tested plenty times and know it's on to the next month now. This is the second round of everyone around me getting pregnant and we are still waiting for one. My sister in law who used ivf twice just got pregnant natural at 35 for her third. my cousin is pregnant with her third, best friend pregnant with her forth...

I'm 29 and never imagined not having children at this age. I was really in great spirits and staying positive these last few months but seeing BFN but positive all around me kills me. I hate to say it but I get very resentful. I know it's not their fault that my body is difficult it just hurts to see it come that easy to people who don't even want another.