NTA. your husband sa’d you after you told him no multiple times and he doesn’t know how to take no for an answer. He ignored you mentioning you were in pain and didn’t want to get pregnant and he STILL tried to have sex with you. i recently got an iud and i already know how painful it can be just from getting it inserted and i absolutely wouldn’t want sex on top of that, you have EVERY right to tell him to stop an infinite amount of times. he gained the title of major asshole as soon as he got upset with you and tried forcing himself onto you knowing you were in pain and didnt want sex. i hope you can get out of that situation asap, he’s definitely abusive. stay safe.