Hey , i get this a few days before my periods its basically how i get to knw tht its tht time of the month, I always heard other femals cry about back pain during periods, i never got any pain, but suddenly i started getting this pain on my lower back its almost on my butt crack *oops dont noe wats it technical term* It was not that painful the first few times.... But everytime i get my periods it keeps getting worse... N now its unbearable.... I cant even touch it.... I tried and felt a lump ..... I cant sit or get up if im lying down.... Even if i rub my hands on it, it hurt like.... I thout its normal .. But dint find anything on google... Should i be worried? Should i go to the doctor? Please help.... !!!