I hope your husband will get well soon, get rid of the pain first.
What you described, falling off the pot in the opposite direction, sounds like something in the brain. I had it too but they couldn't find anything on the scan even though I felt it snap twice and couldn't walk in a straight line at that time (became better after 5-6 weeks).
Back from hospital I couldn't sit kept falling backwards. I tried several times. I think this is a neurology problem...I could sit and walk as I started rubbing my neck at the right.
I really hope they find a reason and that reason won't be blood clots. A hug for you. I hope you don't have bruises allover. Be careful dear. 🍀💖