Can't cum!!!!

I used to be able to get off every time I had sex.  Then started to be like, I really had to work to cum.  Now I have amazing sex and just can't cum!!! Like it feels amazing and I wanna cum soooo bad.  Like seriously is something wrong with me?!!  My husband thinks he's doing something wrong and I keep telling him that it is not him. (He's more worried about me getting off and I'm the same I just want him to get off,super goals.  Which isn't hard but that's what I want of course). Help! Please