Sex drive

So I used to have a very high sex drive and when I got pregnant with our first in 2018 I never wanted to have sex when I was pregnant and I assumed it would be back after I had her and it never did. Got pregnant again still literally no sex drive. I’m in my early 20’s so I should want to have sex but when I tell you I literally NEVER want to I’m not exaggerating. I’m going to talk to a doctor but does anyone have any idea at all why this could be? I want to want to have sex with my husband and when we’re having sex I don’t want to be thinking how I’m ready for it to be over the entire time.