Please help. Undiagnosed problems. Light sensitivity/Drunk feeling 24/7

Hello,

Last October i had really bad digestive issues. Bloating/constipation and gas. I tried every single over the counter remedy, and nothing worked. Fast forward to December, and i found out i was pregnant. I started to feel a bit spaced out, it felt like i was extremely high. It would come and go, along with some headaches every couple of days, which with a little tylenol would be gone.This went away after a few weeks, and then a week later i miscarried. I did not feel spaced out, or have the headaches again until about 3 week later, and now the spaced out feeling is 24/7 from when i wake up to when i go to bed for the past 4 months. It feels like being drunk or high all the time.
I am certain that these issues have some link to digestive problems, because the spaced out feeling gets worse when i eat sugar/carbs. I have been to a gastro who did some stool samples, and the only thing that came back was yeast overgrowth in stool. He gave me nystatin for 10 days, and it didn't do anything except make me a little more regular with my bowel movements. He wanted to do a colonoscopy, but i have put that on hold because i don't want to go under anesthesia with my head feeling this way. Other symptoms i am experiencing:
Extreme light sensitivity
Achy neck
Heartburn/Acidic feeling stomach
Bloating
Constipation
Stomach pressure
Itchy ears/nose/anus
Post nasal drip
Tickling throat/dry cough
Itching/red vagina
Urgency/frequency urination (microscopic blood found in urine)
Undigested food in stools
White tissue bits in urine and stool
Pellet like dry stools
Yellow nut looking things in stool sometimes without consuming nuts
Tingling in hands and feet
Itching on palms of hands and feet, but no rash
I have had a ct scan of the head which was normal, and have been tested for celiac twice. I also read about yeast overgrowth issues seems my gastro found overgrowth in my stool. I saw a doctor who deals with yeast overgrowth who has given me nystatin and diflucan to try. I have given it a go, but i am 3 weeks into treatment now with 0 improvement.
My doctor said i may have yeast overgrowth, but she is starting to wonder if that is just one of my issues. She said that she has never heard of light sensitivity being described as a symptom of yeast overgrowth, and she is starting to wonder if there are other problems going on. Has anyone else had a similar experience?