Periods re starting?

Sammy-Jo

Hey ladies , basically I came off the depo in october as I had my last shot then and never went back in January for another.

Last month I bled for one day only, it was brown? And this month on Friday just gone I started to bleed it's still brown I've only had a little bit of 'fresh blood, it did get heavy on Saturday and a little into Sunday morning but it's back light again. Can anyone maybe suggest what this could be please? Thanks xx