i agreee with rog. i have had some of the same symptoms you are experiencing at a lower intensity when i first started out on ozone therapy. i had them when i did huge amounts of ozone right off the bat. you have to start out slow and work your way up!! really, your body needs time to adjust, this is very powerful therapy. don't overwhelm your body, take a step at a time, it won't take long to get to a level of mega doses, but you have to take it one rung of the ladder at a time, skipping rungs won't help you.