Possibility of still being pregnant?

Me and my SO had sex during ovulation. I am not on birth control and we didn't use a condom. He didn't quit pull out in time, not all of it went inside of me. I'm only 5 days late as of today. Took a pregnancy test when I was only 2 days late. Got a negative. I have had absolutely horrible cramps, that have had me in tears, nasuea, exhausted etc. yes I know these could be symptoms of my period coming also. Just wanted to see what others thought also.