Wierd & Petrifying Brain Symptoms

I have M.E/CFS for 20 years. Went to dentist diagnosed with peridontal disease whereby bacteria live in the peridontal pockets down the sides of teeth, they live off the plaque, destroy all the area around the teeth including the bone. I have some teeth that leak fluid into my body. Doctor says dont worry my stomach acid will kill it.

After having some extractions and some cleaning I have got ill. Not from an M.E/CFS relapse but feel generally unwell. I keep telling the dentist I feel like something is in my system, something is really wrong. Blood test show nothing, everything is normal, white blood cells normal only female hormones menopause not normal. I have now started with more worrying symptoms, I see images in my head things that i have always been frightened of. My pets faces turn into sinister looking things, the birds have become sinister....i am so scared they have released something into me and its affecting my brain. I read about lyme disease because someone said lyme can cause intrusive destressing visions in your head (?)...no idea...i never ever had anything like this in my life in 20 years of ME. Think I am loosing my mind...literally. Any thoughts