Most likely you are not pregnant. You've had a negative blood test at a doctor's office and your own negative urine tests. We can have these symptoms without pregnancy-- hormone imbalance can cause this. And your period could be on its way. So, sit tight and wait. In a week, if no period, go ahead and test again. I had long cycles for about a year and a half, as in every 3 to 4 months due to a slow thyroid. Not pregnant but almost like pregnancy symptoms. It was hormones out of whack. So, this does happen. good luck