Hi Julie,
I'm sorry you have to wait so long for your son to see an epi I also have to wait 3 months if not longer to see my epi.
What your son is describing sounds a lot like a partial sz. also known as an aura sz. I have them often where I will smell odd odors like natural gas, or something burning. Then I get a nervous feeling in my stomach and I see colors flashing back and forth in my eyes, sometimes I even hear one word repeated over and over again. Once the aura sz. begins it often leads into a complex partial sz. for me but I have learned the moment I start getting the nervousness in my stomach to tighten up all the muscles in my body and make my hands into tight fists for a few seconds, by doing this it stops the sz. from happening. I wish you and your son the best of luck and May God Bless You Both!

Sue