confused

So I started my period a day early on Sunday the 20th . It was light but gradually got a moderate flow. On the 21st it was still fairly moderate but towards the end of the day it became very light to where I would only see most of the blood when I wiped. TMI when I removed my tampon it was barely anything there. It was a little blood but mostly brown. Today the 22nd there was nothing there when I wiped this morning . I put on a liner...through out the day I had brown discharge mostly seen when I wipe. Can someone give me insight on what may be going on . I hope I explained it well enough.