Fell 2 months ago, pain in back shoulder but now i feel like i'm high when i'm not, like i took a drug. can back injury cause this & if not, then what?

Feeling high / dizzy: It doesn't seem like a fall with symptoms 2 months later could be related-- unless you banged your head when you fell. Feeling "high" could be a cause for the fall-- I wonder if your heart is OK. Were you checked for arrhythmia? Two things affect these symptoms - brain and/or heart - so I think this is serious enough to get checked out by an MD.