I had my period from october 6th till the 11th. It was normal. Every month I have normal periods, well after my normal period, around the 13th, I started having bad cramps and lots of pressure on my lower abdomen. Righ, left n middle abdomen. On the 16th I urinated n when I wiped, it was a light light barley see-able pink color. The 17th it was black looking. The 18th it turnt more brownish then the 18th was deep red. The 20th till today, the 22nd its bright bright red. The pressure isnt as bad today, but i still have pressure down below. What could this be? I have no STDs and my pap came back normal last month.