Hi Miss Aimee,
You might want to read or post over in the TOS forum. Many of the members over there have had interscalene blocks and could shed some light on it.
I myself have had several and have had the Horners experience. Nerves are a very delicate thing in that area. THe injection may have touched one of them and might take a little longer to recover.
At the top of the TOS forum there is a sticky with some docs list who are experienced with these types of blocks. You could contact one of them and see if they could help.
http://neurotalk.psychcentral.com/forum24.html


Shelley