Are you post-medicating with something? I've been on R for 4 years now and I'll still feel like crud at some point the following day - so I pop some advil and I'm as good as new. Make sure you're drinking lots of water and post medicating and maybe that will help.

If the above aren't working, there's no need to be miserable. You've given it a fair try for about 8 months now. If you're ready to throw in the towel, there are other meds. you could try if you're so inclined. Copaxone doesn't have any flu like side effects and Tysabri is only once/month.
I hope you feel better soon.