Hi I am 20 and i normally start my period in between the 2nd and 4th of every month and lasts about 5 days and is bleeding to wear i use a tampon or a panty liner it kinda depends. so this month i have had my period 3 times and they are all about a 5 days or so apart and last for about 5 days, they look the same as my normal periods, although i have absolutly no cramping just a heated feeling near my lower tummy like it gets really warm inside and then i bleed the next day or couple hours later, normally i get cramping pretty bad the couple days before i start. this is really worrying me. my doctors say i have no thyroid problem and they did a uti test and a pregnancy test and they were both negitive as well. please help me out im not sure whats going on but i am worried and sick of this. ps i am not on birth control and do not want to be. and this has never happened before and nothing has changed in my life so im really clueless