I am experiencing crazy symptoms: tachycardia, lightheadedness, receding and inflammed gums. EKG, cardiogram and basic blood work all normal. Got woken up at nidnight with lightheadedness and warm waves/weakness moving across my body in sections. it started with my head, moved in waves down to my feet, and back up. I ended up sleeping proped up against a pillow but my lower legs still feel that sensation. They checked me for Sogrens, Thyroid, CBC- all normal. My dentist said my gums seem okay, but I told them they hurt so he gave me a peroxidine gluconate rinse which helped, but the waking up lightheaded stuff just kicked in. What could this be?