Why does my skin feel sensitive when I'm on my period?

Well I have dysmenorrhea (aka painful periods with vomitting, chills, and fever) but my skin also gets really sensitive and it hurts a little when my clothing rubs against it. Is it just another symptom? Also, my legs feel so heavy and tired, really sore and hurts when I move them. The skin part is bearable but when my legs hurt I can't move anywhere or else they hurt! I have missed school numerous times due to this and I don't want to miss work when I have a job. How can I deal with this without having it interrupt my life?