I've also had dizziness & balance problems following the birth of my eldest 31 years ago. It was put down to anxiety. Anyway long story short, peri symtoms hut me big time 3 years ago with the dizziness, balance issues becoming a daily occurrence. I was sent to a neurologist in May this year, who diagnosed vestibular migraine, likely triggered by menopause, symptoms are often described as having just stepped off a boat, sick headache or a hangover. Most often sufferers don't get a headache, the dizziness is the most debilitating symptom. If you suffered motion sickness in childhood, chances are you could have VM also known as Migraine Assosiated Vertigo. Look it up as theres loads more info about it.
CG x