TTC but my husband has low sex drive?

So, me and my husband are TTC and it comes time to have more sex (I see the EWCM) and he doesn't want to. He's explained it's nothing against me it's just simply he has zero sex drive. We just had a miscarriage so we weren't having sex for a while since I was worried (then I had to recover) so before thanksgiving we probably haven't had sex since late September or early oct. He hasn't been working out, he's been stressed, tired, and it upsets me. I'm trying to be understanding but these are the days we NEED to have sex to get pregnant. I feel bad that I feel this way but I feel like we missed our window because he wanted to drink too much so he couldn't "deliver" (twice while I had signs of high fertility) then suddenly wasn't in the mood when he wasn't drunk and apparently hasn't been for a while. He's never ever been this way. Usually, I can't keep him off of me but now, when it counts, nothing. 😔 I feel helpless. Anyone go through this? What can I do?