Anxiety, stress, etc. presents itself in any number of ways. Especially for the sake of your son you want to do all you can to be the loving, confident, healthy parent he needs and deserves. Maybe you want to consider a therapist, maybe some mild meds.
Now I recently watched an interview with a man who wrote a book titled "Hyper-Chondriac" that sounds very interesting. His name is Brian Frazer. Perhaps your library has the book and it can help you.