Period with severe abd cramps and back pain, very heavy bleeding (one super+ tampon an hour), clots, very tired, lightheaded, dizzy, cold. go to er?

Excessive bleeding: This is excessive uterine bleeding and it occurs in women your age who do not properly slough the uterine lining. A dilation and curettage with a lining ablation will help this problem. To stop the bleeding the on call ob/gyn can call a prescription in. I think it is aminocaptaproic acid. See your ob/gyn and they can sort through this problem. Good luck.