My regular cycle is on 5th to 7th of every month. I had mild spotting on 27,28,29 of September. I doubted for pregnancy and hence I did the home test which turned out negative. I again did the test on 5th of this month when my period was due. It again turned out negative. I had severe cramping yesterday (5-October) without any blood discharge which vanished in the eveng. What does this mean? Am I pregnant? Or is there any other problem?