Post partum sex??

I’m 2 weeks post partum and all my husband can talk about is sex! I get it in the sense that’s a long time with no sex, and still having 4 more weeks to go… but it’s really making me dread it…it’s honestly all he talks about and jokes about… like joking how he won’t last long and stuff like that… But I feel like he hasn’t been great post partum… I feel like been checked out emotionally the last 2 weeks as well so expecting me to be excited to have sex again is really turning me off that much more…. I’m to the point I don’t want to have sex at 6 weeks even. Would it be wrong of me to make some excuse up and or say my dr said I can’t for another 2 weeks? Just to give myself time? I’m seriously dreading sex again. Maybe if I felt like he actually was trying to help me take care of me the last 2 weeks or even just care about me other than just for sex I’d actually want to but rn I’m so not even close to being in the mindset of sex again & prob won’t be for awhile… I’m just wondering if I’d be horrible person if I made an excuse not to and to give myself just a little more time to prepare mentally..