.... Do not have them at the same time.
I've never had a root canal but I watched my mother get them. XD She was severely sick because it affected her sinuses and it took forever for her to feel better. It's like a mini blue parachute in your mouth, as they isolate the tooth they're working on.

For wisdom teeth... I had them taken out when I was 13? I can't stand the pain of needles, so I cried until I blacked out when they were injecting me with the pain/knock out stuff and the doctor kept asking: "How are you doing? Are you okay? I need you to answer me." But I blacked out after that and then woke up in the car, screaming and blood came out of my mouth.

Had three types of medicine to take for preventing infection, painkillers and something else. My moms ex bf was a fruit loop and told me I had to take all 3 and I did. Then I couldn't keep any pudding or jello down and kept throwing up. It was awful T . T; After that tarded moment, I only ate on certain sides of my mouth because the stitches and swollen skin inside my mouth felt funny. I made sure to stay away from savory or salted/peppered soft foods or pop. I mainly just stuck to pudding and jello the whole time since anything like PB&J will stick up back there. I also don't recommend any kind of soup because it has salt in it and you'll regret eating anything hot/warm, while it's healing.

My brother had his taken out when he was 12? 11? He cried while we waited for our mom to go into CVS to get his medicine. He denies it, though. That's because he can't remember anything because his head was still lolly gagging from the surgery knock out juice.

And no, fillings are not supposed to hurt afterwards.
They'll jam that neon glowing blow dryer on them and if it's bad, then they will give you a needle. I've never had that problem with fillings, though. Just filing, that nasty fill in liquid and then the blow dryer because I've only had 1 cavity in my whole life and that was with a baby tooth... which also has another story to it. XD