My husband and I had unprotected sex on the 1st which is right in my fertility window. The next day I began to feel nauseous. Like I just didn't want to eat but I never got sick. About 5 days later I had terribe cramping almost worse than period cramps. I have also had very bad acne, been taking naps everyday, and been peeing a lot more which is all not normal for me. I was supposed to get my period on the 14th but I am now 5 days late. For the past three days I have felt like it was coming (sore breast and cramps) but nothing. I took a test on the 14th and the 15th and they were both negative. Could I still he pregnant?