I was about your wife’s age when GBS hit me. Her case sounds similar to mine. Yes the IVIG treatments are given to stop the progression of GBS. My treatment didn’t work and I was also given plasma exchange. I was totally paralyzed but not vented. I spent over 3 months in hospitals. It can get worse before it gets better. I’ll pray for you. The good news is there is hope. I’m not 100% better two years later but I can do many things. I just need to rest alot and my feet still tingle all the time.