JenniferB, tell us the rest of the story. Did you play the skins? Win any cash? Take the cash?
It looks to me that if you took the cash and the TD reports you as having accepted "pro cash" you can tell the Competition Director, whoever that is these days, that it was post-tournament skins cash, and clearly not going-pro tournament cash.
I would hope that the PDGA would apply the published rule to your situation, but you never know. You just never know.