So I was put on depo when I was 18 I had it until I was almost 20 so I didn't have periods. But my last shot was in October and my periods started back up in May on my normal period day which was the 9-15th so but then a week later I had another period cuz I linked with one of my friends I had became close with so it was the 28-4t I believe so father that my periods have been on the 28th but I am now late by 8days I have taken 5 test and came up with very slight positives. I don't no what to think is it my depo or could I possibly be pregnant?