Missed period

Shelby

I am now 8 days late for my period, we have been trying to conceive but I keep getting negative pregnancy results. Have pain, cramping, sore breasts, and constipation and yet nothing. Went to the doctors, she did an internal exam and thinks I'm 5-6 weeks pregnant, sent me for a blood test and that came back inconclusive. What could it mean? Could I be pregnant?!