I had sex on 1 july. And expected to get period on 15th july but got my periods on 30th july. Its ws normal periods lasted for almost 6 dys .I ws supposed to get my next period on 5th to 10th of september. But it came a bit early. Later I found that 1st day the period was very light almost like spotting then it became heavy and lasted for 6 dys. Can I be pregnant. i did a home test and get negitive. And did not hve sex in these days.