April 15th I had sex with the pull out method. April 16th I took a take action pill, by April 23rd I started to get a brown discharge that lasted a while. I was due to get my period around April 27th which I had got on the 27th. I still had brown discharge along with what I thought was my period. My period was from the 27th to May 2nd. It was red but lighter than normal. I did see some blood clots but my period was not as long or heavy as normal. I ended up taking a pregnancy test about a month after I had sex and it came back negative. I took another one a week later it was still negative. During the month of May, I got back with my Significant other of 4 years and had unprotected sex a few times. I took a pregnancy test a few days ago after my period was late and it was positive. What are the chances that it with my significant other and not the other person?