My period ended three days ago. But i still keep spotting very very light blood every time I pee.

This is very unusual because usually if my period is gone, it’s done for the month. I have very regular/normal periods. Sometimes a day or two off from the app. But i never have periods this long. And it’s not like it’s even a period, it’s just light blood on my underwear for the past two-three days right after my period fully ended..

I had sex on the 19th because I thought my period was over and there was very little blood coming out. Still spotting.

Could it be stress?