Iud strings

Alayna

So I got an iud on February 14th and every time me and my boyfriend have sex he feels the strings and this is a quote from him “it’s like it’s fucking me while I fuck you, it’s super uncomfortable”

I live with my grandparents and they don’t know that me and him are sexually active and if they find out Ill be kicked out (I’m 17). So how do I ask my obgyn to cut my strings without telling her my boyfriend can feel the strings?