TTC After Miscarriage

I'm 29 and I got pregnant on our first try this July, then miscarried at 11 weeks. We've tried twice since I recovered from my d&c, and nothing...two BFNs. I thought it would be as easy as our first time. It's been really hard emotionally and my best friend is now two months pregnant and it's sooo hard to be happy for her. Is anyone else struggling with this? It's hard not to think that I was supposed to be 7 months pregnant right now.