Hey Kid!!!
Well congratulations!!! You are on your way to fighting the good fight. It is a good med. It has some pretty rough side effects to get used to. Many cannot tolerate those side effects. I hope you can. Part of the trick to managing those is to take tylenol or ibuprofen an hour or so before injecting. Also, do your shot at night so you can sleep through the worst of it. I believe ( if I am remembering correctly ) that betaseron does a ramp up type deal. You are problably on a 1/4 dose then you will move up to a 1/2 dose etc. until you are at full dose. Most people don't complain of side effects until they are at the full dose.
Many people say it takes 3 or 4 months before the side effects diminish. Try hard to hang in there that long to see if you can tolerate the drug. I wish you the very best of luck. You sound like a tough guy so hang in there. Oh, by the way, there is a slight chance that betaseron will increase depression - so keep an eye out for that and don't suffer. Talk to your doctor right away if you experience that.