No sex drive

Hey ladies! I need some help! My fiancé and I have been together 6 years TTC for 3. I see a fertility specialist but it will be a month or so before I go to my next appointment and I plan to ask him but in the mean time maybe someone can give me some advice/help. Anyways, I have no sex drive. Like it’s a chore to even have sex with him. Which is weird it’s never been a problem for me! We used to have sex at least 5 times a week sometimes more. But here lately I just don’t want to do it 😩😩 I would rather just give him a BJ and be done. It sounds horrible! I feel terrible. Has anyone experienced this? Is there anything out there to help me?