I'm 22 years old, my boyfriend & I enjoy having sex, but recently everytime we do missionary he has to stop because i feel such a sharp pain on the right side of my uterus. it's so unbearable. BUT when he gets me from behind, it doesn't hurt at all. Could this mean anything? Also, i have an IUD inserted in me, so could it be possible that he's gone too deep that he moved it out of place somehow? i just moved to Texas with him, from Cali & Cali is where my doctor is located. I need answers as to what the problem is &how i shoulf handle it ASAP. thanks!!