You poor thing. I am sorry for what you are going through. I will keep you and your son in my prayers. My dog had blasto so I am not familiar with how differently humans react and especially a baby. Does your Dr. have experience with treating blasto? And do you feel comfortable with him (her)? There have been a couple of people on here that have posted lately and by their posts seem to me like they would be more than happy to help you in any way. I would personal message Connie and blastowarrior and see if you could talk to them and ask questions and have them give you advice. I wish you the best of luck. Read everything you can so that you are knowledgeable and don't be afraid to ask any question you have. There are no stupid questions. You want answers I am sure.
Good Luck and hang in there.