So I am not pregnant, as I took a test and it was negative, but my period is yet to come. I took a plan b in December and I had the idea that its just messing with my cycle. I have no symptoms whatsoever, but I do have minor cramps. I've been having these cramps for about a week now and this never happens before a period. Am I worrying too much and making it worse? Is my period just acting up or could it be more serious?