Is this common?

My husband & i had a great sex life. We've been married for a few years now. I had our son 5 months ago & got on the nexplanon 4 months ago. I'm also breastfeeding. Lately my sex drive has been going down. We usually have sex when our son goes to sleep, but now i don't even look foward to it. I'm not really in the mood. I feel like i HAVE to do it.

He got sick a few weeks ago & we didn't have sex for a whole 3 weeks. it's been a month since he went down on me. He expect me to suck his dick , but he will not go down on me. 😒 It's so frustrating, because he knows how much i love that shit. I know he can see the frustration everytime we have sex... Idk y'all.. 😒