I normally have a regular period, but I haven't had a period since mid July. Towards the end of August, i bled lightly for a day (which was almost more of a pink then red), but by the end of the day it was brown and had stopped by the next morning. I'm currently experiencing a light brown discharge but only occasionally. I've taken a pregnancy test, but it came back negative, but i'm experiencing weird symptoms like crazy mood swings and sleeping alot. any input on what could be going on would be great.