So I have been having cramps on and off for about two weeks and now my lower back has been hurting (since August my periods come with really bad lower back pains it's excruciating - I got an MRI from the orthopedic and I'm pending the results. My gyno says she highly doubts I have endometriosis). Anyway, I got my period last month feb 28th and last to like the 4th of March. My period keeps coming later and later I guess because I got off the pill back in November. I am just stunned that I am already having some cramps and yesterday during sex I started getting cramps. Has this happen to any of you?