question: I HAVE TOTAL SPINAL FUSION WITH INSTRUMENTATION, ALSO HYPOTHYROID (GOITER), I HAVE BEEN HAVING A WOOZY FEELING, HARD TO DESCRIBE NOT LIKE VERTIGO. FEELING OF INTENSE PRESSURE KINDA LIKE HEAD IS IN VICE, WOOZY, CONFUSION FEEL LIKE NEED TO SLEEP WHAT COULD BE THE CAUSE OF THIS