Really confused and hurt

We lost a baby in July we have been trying again since August but hubby isn't really having sex with me much so hasn't been working well. I've tried dressing up different positions and all kinds of things to keep it fun. Yet he still wanted sex less and less. The other day I sat him down for like the 10 time to ask what's going on why he didn't want and if it's something I was doing. He finally admitted to me that he just doesn't want sex with me anymore and he doesn't know why. This tears me apart cuz I love sex with him and we've always had a good sex life. I'm really hurt and don't know what to do.