HELP!! Could I be Pregnant?

I have a pretty regular cycle. I would say between 28-32 days. Also I have never missed a period. My husband was home for leave the week I was to ovulate. We did the deed everyday he was home...no protection and no other "attempts" to prevent pregnancy. Now depending on what my cycle is I am between 2-6 days late. I have had a couple symptoms...abdominal bloating and cramping, extreme fatigue. Three tests later ...I still have a negative. I even used those early detection ones. I wanted to know around what time other women found out they were pregnant. Could I still be pregnant even with the negatives?? Any advice would help...I dont like this limbo I feel like I am in.