I know what you are talking about
. Dh and i have been married 30 yrs this December. I think some of the problem is apprehension. If you are like me, a lot of times you hurt when you do physical things. Moving a different way can make me hurt the next day and pretty bad pain at that. I have said this many times on here. A person with fibro makes decisions every day. Is doing xyz with 123 today, more than important doing abc with 789 2 days from now? Dh and i talk (and get aggravated) about
this issue a lot. Sometimes i just do not feel like doing anything, other times i might want to in my heart, but not my body. Does that make sense? I have told dh that my heart is always willing, the rest of my body is "forget it, or i will make you suffer for your pleasure". Make sure your dh knows this. You are not rejecting him. You are rejecting the pain.
Talking about the problem is part of the battle. Of course some meds may be the cause, and i am sure others on here may know more about this than me. As i had this problem before the meds i am on now, i doubt that is my whole problem.