I have same symptoms as you do and was diagnosed with Sjogren's. Diagnosed at Southeast Regional Arthritis Center. Was tested for Anti-Nuclear Antigen and i had a Positive ANA. My ANA is 170 . dry throat airway obstructed so they are sending me for sleep test to get a CPAP machine because i stop breathing during my sleep. I Also get VasoVagal . feeling of going to faint . fighting sleep all day long .blurry dizzy foggy brain and poor short term memory. Right Sacroiliac joint pain …. Also when right ureter is full , i feel weak like im going to faint.then when i empty it, weakness goes away and Also palpitations go away. All these problems. i feel. are neurological since i have many herniated discs in spine pressing on nerves. MRi of neck shows herniated discs and swollen Lymph nodes in neck under 5mm and suggests to see an otolaryngologist to check for damage to cartilage in neck thyroid area and corticoid area. Lots of swelling throughout body …..