I don’t like sex

Ok I know it sounds weird but I’m in my 3rd trimester and I don’t like sex it feels like more of a chore than something I actually want to. I don’t feel sexy, I can’t get comfortable and I feel fat ( I’m already plus size) I feel bad because my boyfriend really wants to and I don’t. The second trimester I wanted sex all the time hell before I got pregnant I loved sex that’s how I got pregnant now it’s hard for me to even have an decent orgasm . Now my mind is on baby like decorating the room,what I’m going to pack when it’s time for him come, my baby shower, and things we still need for the baby not to mention the bills and the other kids we have. I feel selfish. Has anyone else felt this way. Oh and btw I have 7 weeks left so I’m miserable 😩