I am only 20 years old, and am not sure what is going on. I had my period on the 9th, but it only lasted for a day & a half. It is already the 22nd and about 2 days ago I noticed a light pinkish color on the tissue after wiping. I am still having cramping feelings like I am still on my period, but I am not. I have taken a home pregnancy test, but it came out negative. What could this be? :-(