I know so men may just find it awkward, dont take it personally. He may feel like hes gonna poke or hurt the baby. Im sure its not about you.
He might just be afraid of the bump. Some guys get really weird when they know there's a baby in your belly. They think all kinds of absurd things like they're going to poke the baby or that the baby is going to grab them. Lol. I don't care how long any man's piece is, none of them are *that* long.
But just talk to your guy. Explain that the baby is totally safe and sex is actually good for you when pregnant. I know it's hard to get over that irrational fear sometimes, but just keep communication open and try not to take it personally. He loves you and the baby, I'm sure he's just nervous.
Mine is the same way. We used to have sex 2 or 3 times a day, now I'm lucky if it's once a week. Mine isn't cheating eather were together all the time, and he's very affectionate. I think stress does cause men to loose interest in sex, and also their sex drive lowers as they get older. Not sure about your husband, but mine is 30 and said he doesn't want it all the time cause he's "not 17 anymore". He also said that he feels our relationship has gotten so strong that we don't need to have sex all the time, but I want it. I've just tried to except that his sex drive isn't as high as mine. I wouldn't worry much unless he starts loosing interest in you altogether. Good luck hun!
We watched a movie once where the guy didnt want to have sex with his girlfriend because he was afraid of poking the baby. We laughed about it and i explained to him that its not possible to poke the baby and he said he knows that and its apsurd to even think that. So im pretty sure its not because of my bump. I wish it was though, then i would know how to fix it. :(
He still might be freaked though. Just try a different approach. I'm a firm believer that the "I'm too tired to have sex" excuse is a cover for something a lot bigger. I mean, once in a while yeah, but for weeks on end? He's a guy. And a young one at that.
He might be worried about being able to financially support you and the baby. It's ok, still just communicate and remind him that you have faith in him and that you believe he's going to be a great dad. Nobody is a perfect parent, and certainly not right at the beginning. It takes time to get the hang of everything.
Try to be patient and understanding. Maybe take some parenting classes or something, idk, I'm just throwing out ideas now.