What Causes Mild Rashes On The Arms And Legs Along With Joints Pain?

Yes, my symptoms include a slight rash. It is covering my arms,and legs, I also have bad joint pain, swelling in feet and hands and slight fever, I had taken a dose of poison ivy pills about a wk ago and the rash started to show, its a homeopathic relief for poison ivy or sumac, or to take so you don t break out from the poison ivy or oak....it s only ingredient is Rhus Toxicodendron 4x H.P.U.S.Why are my bones aching so badly in hands and feet only and I haven t had contact w posion ivy,oak or sumac all year, and what is this rash? Also I am feverish...