When slammed to the ground what area of your head hit it?

Could be some muscle strains and/or neck strain also..
You might ask for some sessions of PT or a PT evaluation at very least just to cover that aspect.. Hopefully they would check for trigger points in the muscles - they can refer pain & symptoms to other locations..
I will get a very watery eye if my scalenes/SCM or upper back muscles get tight and /or trigger points.
You may be able to treat some TrPs yourself with finger, thumb or small firm ball (tennis ball against a wall or the floor.. Be careful with any scalene work as the main artery is in that area too.
trigger points chart - Google Search

http://myemail.constantcontact.com/D...id=vdANQp8EL58