Generally if you have a broken bone, the area will be very bruised, swollen and misshapen. You may experience a lot of pain or none at all if it is so swollen that it is numb. You may not be able to use it, depending on the type and severity of the break. If you are concerned that it is broken, you may want to get an x-ray to be certain.
Go get an ex-ray because that is what happened and I broke
You go in for an x-ray since broken bones that aren't healed properly can cause infection and other nasty things.