Hi J..
You don't need to call a plumber. You can do this one on your own. I promise it isn't hard and it won't cost you much either. I know from first hand experience. I had two "flushers" and taught myself the wonderful art of toilet unclogging while I was still single. My little scientists, by the way, flushed everything from a shower head to my engagement ring.
Okay, so the first thing you have to do is get a new wax ring. You can get that at any hardware store for a couple bucks. Next, go home shut off the water to your toilet by turning that little knob down below the tank and empty as much of the water out of the toilet as you can. After that, unscrew the bolts that are on either side of your toilet and lift the toilet into the tub. If you aren't particularly strong, get help for this. Yes, it can get a little messy, but it's not too bad. Pull up the wax ring from the floor and clean off any of the remaining wax residue. Put the new wax ring in place of the old one and turn your attention to the toilet itself.
Now that you have toilet up and in the tub, you'll need to push whatever is blocking it from the underneath side back into the bowl. Invariably, this is the way those little buggers will get back out. If you're hands are small and you're flexible, you can actually stick your hand up the bottom of your toilet to do this. If not, get something flexible, but sturdy and shove that baby in there. Most often you won't even have to work very hard to get the lodged item out because by going from this direction, you're pushing it from the small space into a large one.
Once you have the object out, clean off the wax from the underneath side of your toilet and carefully lower it into place on your floor. You'll want to try to get this right the first time so you might need a spotter to guide you. If you get it wrong and have to pick it back up, you could end up needing a new wax ring. That wax ring is what keeps the water (and other nastiness) from seeping out from under your toilet into your bathroom. I've found that it isn't as precise a job as plumbers want you to believe, but do try to be careful.
Replace the bolts, turn the water back on And viola! You've just fixed your first toilet. Now you're ready for drywall repairs... or at least that's how it worked in our house. : )
Hope this helps!
P.S. Another handy little thing you can get from the hardware for a few dollars is a toilet seat lock. They didn't have them around when my boys were little, but at least they are there for you!