Negative all around!

Eva

So my last period was 11/18 since then I've had light pink/brown spotting for 3 1/2 days..and when I say light i mean liiiiggghht...only when i wiped. I've had light cramps..non painful just annoying. Headaches off and on,sex drive thru the roof..some nausea here and there.

,and constipation but thats all. No period in over 40 days, negative hpt (3) and last week went to the docs for a hcg blood test and Negative as well. So what's the deal?????