sex laugh and IUD question

Jennifer

so me and my husband where haven are fun in bed he rides me from behind then are 🐕 jumps on are bed trying to get to my husband's dick lol and after sex my husband was saying he can feel my copper IUD more the last time we had sex he couldn't feel the strings or anything and each time after sex if he goes to hard I spot and my recent period only lasted 6 days and was little brown and normally it last 7 days and normal not sure if I should get it checked out and I want to feel for myself to see if I can feel anything but then again I don't want to worry and end up getting checked and find out I'm fine advice on that please