I feel disgusted with myself

I am 9 months postpartum, I have no libido partially because I’m depressed but I think my iud is also messing with my hormones. But my boyfriend made me have sex with him last night because it was Valentine’s Day. I said no, I wouldn’t move but he wouldn’t stop kissing and touching me that I just let him do whatever because I’m so sick and tired of having this fight, is it my fault because I have no sex drive? I cried after and felt disgusting..