If you felt better when catching colds in the past, (perhaps like a mini IVIG), then maybe Thorne Moducare would push immune system to more Th1 from Th2 (Th2 causes more autoantibodies). But its probably different for each person.
You and I are in a similar boat. Family family family. You need to have someone who you can take care of you. What has helped me some so far is zinc picolinate ~30mg /day and magnesium chelate. Also taking methylated B complex (Emerald Labs), Vit C and Vit D. But I'm still having issues and trying to figure it out.