I would start back into the habit of getting his meds slowly if it seems overwhelming to you. Like Frank said, the albuterol and pulmozyme are pretty important, so start with those. After awhile, it will be like second hand and your son will become accustomed to this. This is the perfect time to get him into the routine. What do you do on a typical day with him? Perhaps you could sneak in a treatment when he gets up, incorporate them in along with his feedings, bathing etc. Pulmozyme is once a day, so get that in in the morning along with his albuterol... Do you do any chest physio? You could turn on his favorite cartoon and give him physio once his breathing treatments are done. These are just suggestions.....you will find something that will work for the both of you.
Do the same thing every day if possible, and it will soon feel normal.
If your doctor is intimidating, perhaps go to a different one in the group. Feeling comfortable with the doctor is important to his treatment as well.
I hope everything gets back on track soon,
Jenn 40 wCF