Its been 36 days since last period I'm normally 33/34, me and my partner have been trying for a baby, my period hasn't come yet, I took several hpt all come out negative, is it possible I still could be? Im sure I had an implantation bleed which only lasted a day 2 weeks ago. I had brown stringy like blood in clear discharge which I never get, I now have nausea and my breasts don't ache at all when they normally do a week before my period, I'm going out my mind not knowing!