I had exactly this problem for the first few weeks of Paraliminals. I had to reduce down to doing one at a time. I also took breaks for a few days if the light headedness or thick headedness wouldn't go away for a while. I had my ear pop as well! Then when I did sonic access, something weird happened, which felt like my mind was expanding beyond the scope of my head and since then, I have not had this problem! Strange.
