I feel worthless

I don't want to sound like I'm moaning but I've had 2 mc in 4 months and I just feel like a failure. Everyone around me is already pregnant (some at the same stage I would've been if mine had stuck) or ttc and it's happening really quickly for them. I feel like a failure as a woman as I can't give my husband the baby we both want. We've been trying for 18 months and I just want this so badly that I feel down all the time. Some days are better than others but I think about it everyday. Anybody else feel like this?