I should be on my period but I have absolutely no cramps but for the past week I have been having brownish discharge and yesterday I started discharging brown discharge with clot like substances today I wore a tampon because I thought I was going to start flowing but no not like I usually do with other periods it was dry with brown discharge again and thick looking clot like stuff on it no flow like I normally due the wiered thing is I have no signs of coming on my period like I normally do what could this be?