My fertile window is always a week after my period but this cycle its 2 days after. Is this normal? I took ovulation test on cycle day 13 like usual said low fertility ( no smiley face ) then next day it showed Peak , thought it was a mistake then took another this morning and it says peak as well. I usually have 2-3 days low then 2-3 days high then at end of window i get 2 days of Peak . Now im so confused. Could it be a bad batch of teat strips and monitor or could i really be ovulating early? Any advice is appreciated.