Welcome to ThisIsMS. I believe that you will find a supportive community here. I don't know why your doctor would recommend the CRAB medications to you. They are particularly expensive and haven't been approved for SPMS and all of them can have bad side effects (including Copaxone, just do some searching around here about lipoatrophy).
However, there are things you can do beyond the CRABs. Have a look around the Natural Approach forum. There are many folks that have had benefits from changes to diet to eliminate proinflammatory foods and through added supplements, e.g., omega-3 fish oil and anti-inflammatory antioxidants such as r-lipoic acid, EGCG from green tea, and curcumin from turmeric, and also vitamin D3, calcium, magnesium, and zinc.
Lastly, feel free to ask questions. We will usually try to help you or at least get you going in the right direction towards an answer for your questions.