im 18 years old and im on the pill but im ready for a child but im kinda scared this past week has been crazy. i started my period 2 weeks early but its like every other days its gone and then it comes back. on one of the days what i wasnt on it me and my boyfriend had unprotected sex 4 times and everytime he cum inside me. and im back on my period the day after. i started my 2 week period 11 days ago but the first 4 days were really light and then it went away and now its back and its heavy. could i possibly be pregnant?