Hi, ive been having dull aches and twinges as though my period is about to start for the past week but nothing, and now im 13 days late. I have also been having daily headaches right in the front of my forehead like a heavy migraine but this has been going on for about 4 weeks now. I also keep having spells of nausea in the evenings for the past 4 days. Im unsure if any of this is linked but all as a combination is keeping me very confused and worried. Could i be pregnant even though 2 tests have shown negative? Does anyone know what any of this could mean?