Me and my partner had foreplay on the 4th, one of my fertile days, for sometime he did not have his pants on but he ejaculated only pre ejaculatory fluid as soon as I noticed his pants were not on that is 5 minutes later he removed them I asked him to wear them back, my period has started on its normal due date but its not clotty and thick as usual it filled my pad(XL) within 15 hours is this implantation bleeding? I also vomited the day after my periods started. I couldn't sleep through the night due to anxiety about being pregnant. I feel the vomit was due to that. Am I pregnant?