So i have been on the shot for about two months now and i recently got my period which i expected but its been longer than seven days and around the 8th it has turned to a darker brown which i was thinking its just older blood and my bodys is cleaning its self but it is kind of concerning because im not aware of howe long that i will keep having this brown what i hoppfully think is old blood , will continue to happen ...

Ps any answers help thank you !!