I am 20 years old. I usually have a weird cycle I usually go 2 months without a period because I am under weight and stressed. This time I have not had my period since October 17th 2008.*3 months* I had sex unprotected around that time. I had sexual intercourse on October 24th or 29th, where I was ejaculated in. I took a pregnancy test in Early and Late November they both were Negative. Only one breast is sore, My urnie stinks, and it burns when and after I urinate. My sleep pattern has changed I sleep all day and stay up all night. I HAVE NOT, been vomiting or feeling dizzy I DO NOT have stomach pains, or constipation. I am not on any type of birth control, my stomach hurts sometimes but not always and not really bad, and I have stomach pains all the time anyway, Is there a more possible chance that I am pregnant, or not? I have not gained anyway or any weird eating habits.