@earldumarest The IUD vs big egos made me laugh!
He is most likely feeling the strings of the IUD or your cervix. It's possible but very unlikely he could be feel the iud, this would only happen if it has shifted enough to partially on the other side of your cervix, you'd likely be having more issues if this were the case though.
He needs to be shown or had some
anatomy explained to him. He isn't pushing through your cervix when you have sex. I don't doubt that he could be hitting your cervix, this can definitely be painful and could be causing the cramping afterwards.
Since you mentioned the LEEP, are you still getting followed and checked regularly? The bleeding could be related to abnormal cervical cells. It could be something like minor like cervical ectropion or something more problematic. Either way, if you haven't been checked lately, it's a good idea to go back! Some questions to consider that may help identify the cause >>> Have you had this issue with any other partners? Does size seem to be a factor? Is is more common in certain positions than others? Do you use lube? If yes, is it possible that it could be irritating you internally (same applies to condoms)? If no, consider trying using it. Even a small about of irritation or excessive friction can cause microtears.
I've had issues with bleeding and cramping after sex because I have a cervical ectropion. I've also got an abnormally tilted cervix and likely uterus so position is definitely a factor. Big dicks definitely make those issues more likely because they're more likely to hit my cervix. Just more vigorous sex in general can do it haha.
It's certainly not time to freak out, but definitely get stern with your doctor. There are other possibilities too, like ovarian cysts.
Feel free to ask me anything! If I think of anything else I'll come back and update my post.