Hi im 14 years old and have been noticing some odd symtoms while on my pre-menstruation cycle. Last month before and during my period, I began feeling cold and shivered in my arms ad legs, had throbbing headaches, and fealt very dizzy. My period is beginning tomorrow (at least its suppose to) and i started these same symtoms but now have began an odd heart burn that seems to only be at the bottom or under my heart and a burning pain on my lower right side that makes it hard to breath due to the additional pain to my side. I cant help but worry but please give me answers, thanks.