Firstly, being scared to death, is not going to help you with the illness due to the stress it will cause.
Secondly, I don't think you are going to "get used to" Copaxone if you are having hives. My husband also had those, and after the 3rd time, he stopped using it. Didn't seem to be helping anyhow! He has the slowly progressive type...not RR, so really, there isn't anything for that.
The best thing you can do is observe a healthy diet or something like the Best Bet Diet or Swank diet. Next take Vit D, and check out the other recommendations for supplements on this site (Jimmylegs or Cheerleader).
If you can still exercise, try to keep your circulation going....
Maybe send your kids to school, so you don't have the extra stress and burden...I understand why you want to, but not all schools are bad.