Insecure & overreacting?!

Am I the only one who has a boyfriend who sometimes doesn’t get off when we have sex? Of course this makes me feel like I’m repulsive... he’s a VERY good looking man. Goes to the gym daily. Beautiful body. & I’m a mom with wrinkles and rolls and fat. We used to have the best sex life in the beginning of our relationship.. but when I got my iud he started saying it was “painful” for him. Every time I get it trimmed, it still hurts... so now I’m just beginning to think he doesn’t find me attractive anymore and doesn’t wanna sleep with me or does it out of obligation... 😔