Fizz - So very sorry about your brother. If you get a chance, look for a book called Closer to the Light by a doctor named Melvin Morse. It's about a scientific study of near-death experiences in children, and I found it very moving and reassuring.
Also - please, honey, do this for me: please get checked for celiac disease. Runs in families, connected to other autoimmune disorders, increases your risk of lymphoma if undiagnosed and untreated. You and your son both should be tested, it's a simple blood panel.
Take a little time for yourself, the stressors are piling up here. Even good stressors like a new grandbaby are still stressors.