advice please

Mikayla

So my period came right on time.. was pretty normal and annoying. However it ended on time to 2 days ago. about mid day yesterday I noticed a red tint when I wipped and assumed just residue. However this morning I noticed it is a little more then yesterday. Any ideas what could be causing my spotting after my period ended? and yes u know it ended because I had a whole day of dry tampons. I have no cramping or anything. I did fall down a flight of stairs yesterday morning. As far as I know I'm not pregnant but I didn't test to confirm because my period started. Thanks in advance