Hi sheds,
If the hospital has admitted they are at fault then you have a strong case. I had a concussion from an auto accident a few yrs. ago and one thing my lawyer told me to do and you should do it also, keep a daily journal of how you feel, describe the headaches, what time they started and stopped, and if you've had any sz. by doing this the lawyer can use this for evidence. Also write down how you felt before all this happening. Did you have headaches like you have now etc.
Often a person will have a headache after a seizure (sz.) but if they have increased it's do to the fall and whatever you do don't pay any of the medical bills make the hospital liable just be sure that if you get any medical bills to save the envelope it came in and write down the date you received it in the mail. I did all of this and I won my case and my lawyer kept my case open for life so if things get worse the other person who hit me is liable.
Here's wishing you well and May God Bless You!

Sue