Typical response from your doctor, there, I'm afraid, but not much help.
You also said this somewhere else:
I was diagnosed in 2001 and am 43 I hate this disease although I know there are worse things!
I was diagnosed with SPMS in 2003 and was going very rapidly downhill at the time. In the long run, I would say, you might well end up thinking differently. I would suggest you read the following link on the Antibiotics thread:
"Ignoring the Evidence"
After this, if you are interested, there are many other links both in Antibiotics and the Regimens section. I seem to pop up all over the place!
However, I have been on this particular treatment for just under two years now, and despite for much of that time being a lot less active than I was a few years before, I was under 130 lbs when I started and am the same, without any dieting. Before this I was
starting to put on some weight.