By your description, test your primary electrical first. If you have courtesy lamps under the dash or a working clock, you can use them to monitor whether or not you have power. Be sure your column shift is in neutral, as park will lock the column. It may have shifted to drive or reverse, which will prevent starting but will not have caused the engine to stop running.

I'd suspect a problem in the battery or battery cables. Start your testing with a fully charged battery.