Cramping and pain post sex

Amy
Hey guys, I have had my iud (Mirena) for a month now and my partner and and I had unprotected sex a few hours ago but I have been having cramps ever since (like seriously it has been almost 5 hours and kf still hurts ), and my vagina has also been sore and it burned when I tried to pee a few times after sex, kind of like after the first time you have sex.
Has anyone else had any of these and should I be worried ?