First time dermadry dizziness question

Hi all! I'm a long time HH sufferer, both palms and feet. Tonight, I finally got a chance to use my new Dermadry. I got it all set up, had the right level of water, sat down, turned it to a 2ma and felt nothing for 5 minutes. I decided to restart at a 4ma, and now could feel some tingling. I did exactly 15 minutes and then removed my hands and started cleaning up. Within a couple minutes I got extremely dizzy. I felt like I had the spins and felt really nauseous. It's now been an hour and I still feel really dizzy and have a headache. Is this normal after the first use? Did I set the level too high? I'm not sure what i did wrong. Any help is appreciated. Thank you.