You have my sympathy - your wife sounds just like my mother did during the menopause...
Like all human conditions, some people breeze through the menopause and a few suffer a sort of temporary insanity...
My mother made my father's life an absolute hell for many months as she accused him of bedding the canteen staff at his work and would be watching in case he left the premises so she could give him the third degree about where he had been and who he saw. She even believed he was signalling with our bathroom light to a young girl across the road...
He was almost forced to leave her.
In those days of old-fashioned doctors I heard a radio news report about new-fangled hormone replacement therapy (HRT) and suggested my dad took mother along to the doctor but the doctor hadn't heard the broadcast and knew nothing about the treatment...
They had some epic battles and many items in the house ended up broken but eventually she returned to her normal, gentle and loving self. Strangely, my eldest daughter went through a similar sort of madness during puberty...
I don't think your wife needs to see a psychiatrist but does need the services of a sympathetic General Practitioner!
I hope this helps you...