bleeding for 6 days and breasts still tender and full for 18 days after ovulation, pregnant??!!

Hi! Usually the first day of my period is very painful, and bleeding lasts only 1 or 2 days with brown spotting for a few days before and after bleeding; always have breast tenderness after ovulation but that goes away on the 1st or 2nd day of period. Now it has been 18 days since ovulation, I have had bleeding for the last 6 days, but no pain (?!), and bleeding is very different-only when I go to the bathroom, 2-3 times a day and nothing inbetween; bleeding is jelly-like, no clumpsy cloths. My breasts are still tender and full, my BBT dropped steadily for 2 days before the bleeding started and stayed below coverline for the first 2 days of bleeding, then resumed trend up and passed the coverline. Had a blood pregnancy test today that turned out negative. :-( I don't know what to think. I have been trying to get pregnant for a while and really want to be. Any thoughts anyone? Thanks!!!