Basically no one can give an answer to this until they officially diagnose what was severed. Tingling indicates the nerve is involved in some way. Also the movement of the wrist (I am assuming in extension and not flexion) could indicate either tendon and/or nerve.

As a general comment either way you are looking at months rather than weeks. The nerve will obviously take longer it it was severed but perhaps you can use some form of bracing if it is permitted to at least stay at training