Hi @luckydog - When I'm trying to find new or research type medical information a lot of times I will use Google Scholar (https://scholar.google.com/). Most of the time the information I find is way over my head but sometimes you can glean some information that may be helpful for learning a little more about a condition. I did a search on Google Scholar using the phrase "low IGA, IGG, IGM +spinal tap for oligoclonal bands" to see what it would find and was surprised by the amount of links. Here is a link to the search results:
https://scholar.google.com/scholar?hl=en&as_sdt=1%2C24&as_vis=1&q=low+IGA%2C+IGG%2C+IGM+%2Bspinal+tap+for+oligoclonal+bands&btnG=
I also found a few articles on MS that may help you learn a little more about the condition.

6 Ways to Help You Cope and Accept Your Diagnosis
-- https://multiplesclerosisnewstoday.com/2018/02/07/ms-six-ways-to-help-you-cope-and-accept-your-diagnosis/

MS and your emotions
-- https://www.mstrust.org.uk/life-ms/wellbeing/ms-and-your-emotions

I have several autoimmune conditions and was kind of down when I was diagnosed with each of them. What has helped me get through them is learning as much as I can, doing what I can to help improve the symptoms that are within my capability, and accepting what I can do nothing about...not that I like it.

Hoping you find some answers...