My periods aren't regular. But for the last 13 month I have been tracking them on a period tracker. According to this period tracker application I am late. My last period was 2nd April. I have taken pregnancy tests and other than some evaps been negative. I don't know how long I should leave it before I go to docs or take another test. Am so confused, last few months (about 3-4) this tracker app has got when I'm due on pretty spot on, give or take a day and now this. X