Hi I had rheumatic fever as a kid, I was in the 7 grade. and I to had to be out of school for 6 weeks, I was in the hospital for 2 weeks. I don't remember being in any pain except for my knee I had hit it and it swelled up , that is how they found out I had it. I also was sleeping a lot. I can remember when I was in school and we had to run it felt like i had bricks on my feet. I was getting penicillin shot for a long time. plus I also was taken penicillin pills for a long time. left me with a heart murmer, But now that I'm older they docs say they cant not hear it anymore. I now am 65. The treatment today I would think would be different that when I had it. I have lived a normal life. Hang in there it will take time, Hugs to you and your daughter.
P.s. I to had strep throat before I had found out I had rheumatic fever. If you want to pm you sure can.