I am a 21 year old female. I had unprotected sex on November 23rd. It was my first time. My periods date for December was 12th. I have very irregular menstrual cycle. I noticed some brownish and pinkish discharge on the 9th 10th and 11th of December. I got my periods on January 6th. I was very worried that I might be pregnant and I took many pregnancy test kit each time it showed negative. I had sex again on January 26th. My boyfriend used condom and we were not able to have sex properly that day. He later on went to the washroom and removed his ejaculate. I got my periods on the 15th of February. The blood flow was less and I usually have stomach pain during periods this time I didn't feel it and I also noticed some small clots during periods in January and February. I had normal bleeding in January for about 5 days. This month it's the third day and it's like my periods has almost stopped. I took pregnancy test on 13th February in the evening around 5 it showed a clear negative. I was going for aerobics I left from December and my sleeping timings have changed and even my eating timings have changed I skip breakfast almost everyday. I feel like I have put on weight especially near the stomach and arms. I have no symptoms of pregnancy but is it possible that I am pregnant? My boyfriend tells he is sure he didn't ejaculate inside me.