Period Color!

Lindsey • I'm an 21 year old introverted redhead. I'm a senior English major, and I love to read, write, and sing 🎶😍📖
So I recently thought that my period was about to start because I was experiencing all the symptoms I usually do. However, today I discovered dark brown blood in my underwear, not like the usual bright red of my period :( is this a cause for concern?