IUD strings

Hello ladies so I got my iud inserted Friday Feb 23, it was during my period. Was told by my OB to wait 24hrs to have intercourse again. Today my fiance and I had sex and he felt it but he said when I pulled out he saw the strings with two red dots go out then in and couldn't feel them. Sorry if it's tmi , I was just wondering if Tia has happened to anyone. I am going to the ob later on today any advise would be helpful