I am sexually active and the only precautions I'm taking are condoms. My periods have always been irregular, but I have never been late by a week. I've taken two pregnancy tests and they both came out negative. I have not had any period symptoms, which usually start occurring a week before I start my period. The only symptom I've had is tender breasts, but they hurt more than they have ever before and that usually only lasts for about five days, but I've had sore breasts for a little over a week now. I've also been getting abdominal pains for the past two days, but they hurt more when I stretch or move a certain way. I've also been more tired than usual and have been more moody. I also weigh more than I ever have in my life. Could I possibly be pregnant?