I am 46 healthy fit person. I have never skipped a period. Dec 22 my period started then the 4 Jan I had another period. On the 8 Feb I has a clear blood spot on my toilet paper. My period is missing and 8 days has passed. I had cramps when my period was due but no bleeding. I am on no birth control pills and have tested for possible pregnancy it came negative. What is happening to me?