I have a question...Each time I m on my period it only lasts a couple days to maybe four but on the last day when I take my tampon out I always have this slimy, liver looking stuff come out on my tampon. Its usually alot that when I pull it out I have to be careful not to make a mess because its big pieces hanging off. What is that & should I be worried? Sometimes, but not every time I have my period, I hurt so bad on my right side, mainly at night, that I m up all night trying to stop the pain & I also will bleed really heavy during those times.