Help!

Charmaine
So my last depo was in June last year, it ran out in September. I was spotting in November for about 2 weeks then it stopped. Then I was spotting again for about a week in December/January then what seemed like af turned up on the 14th of February (impeccable timing) and I haven't had anything since, not one ovulation test has come up positive neither has any pregnancy tests.. I had symptoms in March and went to the doctors for bloods and it all come back negative, doc told me it was my hormones regulating themselves and I should be back to normal soon... Has anyone else had this? Did af regulate herself? I was on the injection for about a year if that helps