It's the first time im using pills, i took the first pill midway my cycle (about the third week). Now i have my period which started last sunday, and it's saturday now and im still bleeding although it's scanty. The problem is today i found a tissue-like mass in my pads, it is about 2inches by 1 inch big, brown in color. Is this normal? Im kinda scared coz this is the first time this happened to me. I took a pregnancy test last week at home and it turned negative. Need you're advices, thanks.