I had sex May 3 this was the first time I had sex in years. We used protection and I was ovulating. I had a period but it didn't last as long as it usually does and I spotted the 2 days I had it. My period is usually heavy and last 7days. My breast have been tender for a while now and I have been having morning and afternoon sickness for the past month. I have taken pregnancy test and they all say negative. Could I be pregnant?