I think a lot of people don't take tooth infections seriously and let me tell you IT IS SUPER SERIOUS! That is an infection NEAR YOUR BRAIN! You need to get on antibiotics ASAP even if your dentist can't see you. It's one of those things that I've even run into with my dentist (who I love) when I called about my implant failing (which is a thing that can happen)!
I happened to get one of the new receptionists on the phone who was like "I think he can see you in two days." To which I said, "So are you calling in a prescription for antibiotics right now so I can be on them until then? Because as I said, there's pus and that means that there is bone loss happening." There was a long silence and she said, "Right. Uh. Can you get here in twenty minutes?"
But it still freaked me out and I mentioned it to my dentist because if I hadn't known that things could've gone very badly. Even if the infection hadn't gone to 11, I still would've been looking at bone loss around the site. As it was, they ended up being able to save the implant (thank god because taking it out would've likely broken my jaw) and everything was fine.
Advocate for yourself though, as with anything! And I also brush after every meal and floss. My husband who has to be reminded to brush, eats more sugary things than I do and never flosses never has a fucking cavity ever. Fuck tooth genes, man.