Hi March,
Welcome! Nice to meet you.
You have been given lots of good information and sites to read. I hope you heal fast, and don't have any lasting problems from your fall and head injury.

As a kid I fell often and had many concussions. Half of them I didn't even tell my Mom. The last one I climbed a 6 foot ladder and fell off, hitting the corner of a concrete wall and then the ground.

I was unconscious. At the hospital they had to shave my head where the bleeding was to stitch. As a teenager, I thought that was the worst thing that could happen. Shave a big hunk of my long, head hair.

I fainted many times for no reason after that time, who knows. It was eons ago.

Things happen fast. So rest and take care. Call your doctor if you still don't feel well.