I am positive that this isn't rhuematic fever. I had rhuematic fever, and it is MUCH different. It is a heart/nervous system/skin thing, and I have them all. Rheumatiod arthritis is much different, and is caused by genetics. I am 23 and I have to have my mitral valve replaced. My heart failed on me on new years day. I have a two year old, and I almost left him without a mother, and my husband, well, without a wife. I hope you find the cause to your joint aches. God bless.