Sounds like you plugged into a 30amp receptacle for something like a home clothes dryer. If the circuits in your rig hadn't tripped you could have fried many things .... you'll need to look for any damage regardless. And if you haven't already done so, unplug your rig from that receptacle now!
Sounds like right now you don't have access to a 30amp receptacle wired for an RV. So go buy an adapter that will let you plug your RV's power cord into a standard residential power outlet. The adapter costs just a few bucks, and is available at any camping or outdoor supply store. Might also be available in Walmart.
If you're new to RVs you might want to invest in a book for new RVers. Read your RV's manuals and papers if you have them, too. This forum has lots of info as well.
Congratulations on your Fleetwood! :-)
[B]BichonLover is a 100% California gal, driving a vintage Fleetwood in SoCal.