Bad day...

So I am married and my husband and I have been TTC since December. My cycle has been very unpredictable so I started taking ovulation tests to help maximize my chances. Well I took one today and it came out positive. Just so happens that my husband has today off as well so I get excited and tell him. Hey today's the day! Well his response is that he just doesn't have that drive....my husband has a lower sex drive so we can go weeks without sex and it sucks. I know it's not my fault but I can't help but feel like it's me. I gained some weight, so maybe he's just not attracted to me anymore, maybe I should put on more makeup, do my hair more often. I know that is not the case but i just don't know what to do. He knows how important this is to me and how bad I want to be a mom. Just sucks. I want him to want me more and I want to make it fun for him. I want him to want sex as much as I do...What do I do?!.. 😔