Iam 4 days late and have never been late but one day I took a test 5-10 nd it said negative idk if I'm too early or I'm wrong but ive never been late so what do I do I use to be on depo inn2014. But I didn't get my shot that July I stopped nd immediately started my periods but in sep 2014 I. Was late this doc said it was because I was regulating but since then I've been having regular periods every 19 days so. Wtf is going on