getting your wisdom teeth out hurts nowhere near as much as breaking your arm, it's just a different type of pain, less movement-agitated, more dull and annoying.
it's just a part of the operation as far as the bleeding. your mouth will taste slightly like blood for like a full day afterwards/you'll have to keep putting gauze in there for like a day but we don't mean blood gushing out of your mouth haha
i have to admit it was a little annoying but not scary in the least. just make sure you get someone to drive you back from the doctors cause you'll be feeling real good after the nitrous.