Can I be pregnant despite of a negative urine pregnancy test taken during periods? I got 2 monthly period cycles, bt the flow was reduced and it lasted for only 1 n 1/2 days. I had also taken Ipill 9 weeks back (within 24hrs of contact) and had got withdrawal bleeding after 7days, which lasted for 2days. Bt now I have started experiencing weakness, nausea and a constant burning stomach , that's why I am very worried .