I'm 20 years old just finished my monthly for this month and I'm still aching and my right side of my body still really hurts?? I can still move my right arm and hand but when I went to stand up from my knee down on my right leg was swollen and stiff for a while? I started freaking out! I don't know if I should go see a doctor or go to the ER if it happens again. Has this happened to anyone else before??