I am on CD22 I have had a negative urine and blood test today but had sharp cramps and tired for cd16-20. I feel in my heart that i m pregnant as the symptoms are the same as my last pregnancy 2years ago. Ultra sound today showed small dark mass in uterus which could be the beginning of something but because blood work negative they are saying could be a cyst or free fluid. what are your thoughts?? am I out of the running this month for my positive?