On August 7th I got my period which was not a normal period. This one was very light, more brownish color blood, and last about 5 day. I have now just started another cycle. Bright red blood, heavier than the last, but not my normal flow. I do have a history of cysts on my ovaries. Two have ruptured. The second one ruptured about two months ago. I am not on any birth control and have had sex. I did take a pregnancy test last night and it came back negative. Any thoughts?