A month ago me and my boyfriend had unprotected sex and he came inside of many times. Two weeks later I had an abnormal period, basically I was spotting for seven days. But, before I had my period I was having a lot of pregnancy symptoms.Later on that week I took a pregnancy test it turn out negatives. But, as the week goes by my breast is very tender and is getting very big. Also am ganning weight and my stomach is getting big. Lately I been craving a lot of food and I cant relate to certain smells. I have an anormous appetite and I been having a back pain could I be pregnant or is it a mind thing