Thank you for the update. I've had one similar experience from a common cold medication. I turned left onto another road, and went right onto the right curb, had one wheel on the grass, headed for a tree, popped down at the last minute, and couldn't orient myself as to where the road was. When I tried to slow down, I was speeding up. I finally managed to find the brake, and crept along until I was home. Never took that cold medication again!
Our hearts and prayers are following you.