See I Was On The Depo Shot For Like 2

See I was on the depo shot for like 2 years and now that I have decided to get off like 3 months ago I haven't came on but I'm spotting like mostly everyday like the brown type of blood like when I use to go off. I'm crapping and everything like i'm on. I thought I would be on for like three months straight. Am I on but not bleeding heavy ? What's going on ?