What?

A few days ago I backed in to a parking slot at my favorite hardware store. I came out about 5 minutes later, and did no leave with my car! I put her in drive and nothing happened. No reverse, either.
After renting a trailer (we had a rather exciting blowout on a busy highway), I got her home. I tried warming her up to check the transmission fluid level in a level spot, but the ATF remains cold, and for some reason above the full mark. I get a change in RPMS when I hit reverse, but not the slightest threat of motion.
I doubt this is a band adjustment issue, but I have never had trouble with an automatic transmission that did not give clues to it's condition first, as this has. Total surprise.
Somebody out there tell me that this is an easier fix than it appears. Or at least tell me you have (or know where I can get) a used auto for my
car for cheap. I am missing school time here (I am 30 miles from the school, and public transportation is NOT an option). She has been such a good girl, it makes me sad to just go out and start her with no chance to go anywhere.

Any help appreciated!

Thanks!

Stan (NW Washington State)