Anyone use a coil? advice needed

Hi all, I need some advice please

We have been using a coil for about 4 years now, and I was wondering if anyone else suffers any type of pain during sex? As a bloke during intercourse I can feel the end of my penis hitting it, I was just wondering if this is common? And my girlfriend has said that sometime she can feel it too and it can be painful.

My girlfriend has been to the docs to check it out to make sure it is still in place and they say everything is ok & that I shouldn't be able to feel anything.

Has anyone else had this experience?