Feeling like a failure

I am in the middle of my second miscarriage out of two pregnancies. I have no babies yet because every time I get pregnant I miscarry. The first time I was 10 weeks and this time I was 5 weeks. I don’t understand why this keeps happening to me. My husband and I get so excited and I feel like I am letting him down. He doesn’t make me feel this way of course and he tries to tell me otherwise but I don’t know. I feel like he’s just going to stop being phased by it at some point and I don’t want us to give up.