For three to four years i have had periods some very heavy with colting size of quartors..some w/dime size clots. cramping in lower belly and lower back almost as bad as giving birth..had test ran and exray ultra sound. with the same docter whom fixed me three years ago so i cant have babies..she says i am ok yet the periods come two - three time and sometimes not at all..always with cramping and sometime with the clots very heavy flow..what is wrong with me..i need answers and no seems to have them my faith in docters is growing thin...why do i pay them when they never have the answers..confused please help