Legzz, welcome to NT. I'm sorry for the reason you're here, but you will find that this is a great place to be.

I can't help you on joint pain or Rebif, because I've not had experience with either one. I've been on Avonex and Copaxone, and I'm on Betaseron at present. I'm sure other people with Rebif experience will be able to help you.

Hope to read more of your posts.