Pain during and after sex

So I got the IUD fitted back in 2016, for some time now, I’ve been in a relationship for 3 years now and I’ve noticed that whenever me and my man have sex I get the most excruciating pain after (it feels like trapped wind lol), when I pee afterwards I feel to push to pass wind but it’s too painful and it feels like if I do it will come out (I know it won’t!). It’s got bad to the point where we either don’t finish or I try and bare the pain. I have been to the gynaecologist and they said everything looks great and they are not sure as to why I am feeling this pain and that it’s not uncommon. The only thing is that getting an appointment to get it removed is non existent as they are fully booked until the end of June 😰🙁