I am too much worried about my girl friend

. She is with me for 1 year but she never tell me about this type of problem . Today she call me and start crying and tell me about the whole problem . Her periods are normal for 3 days and also liquid of menses but very much pain in abdomen and legs . Some times she go to doctor . Doctor give her some medicine but she never feel relief . she said I want to die , some times her legs do not work properly in this condition until she can't walk .
Please help me .