Filling panic

[Little tiger]

I had deep filling on a back molar yesterday. I got told it'll need an eye on it as it might end up needing a root canal in the future.
I was ok but I've been feeling nauseas and sometimes dizzy with tinnitus. I do have an ear problem which can cause the dizziness but the nausea isn't. I took two painkillers yesterday but haven't had the need to take one today.
It's just been a day so I'm still sore.... but is this a bad sign or just something else? I can only wait it out as this of course happened late Friday when my dentist is close!
I'm in full fear mode as my other tooth failed a deep filling and got infected which ended up as a root canal. It was a dead tooth and this one is still alive but it was a bad experience.
I keep losing my trust in dentists and though I was fine with the root canal I'm now scared of fillings!
The dentist wants to do fillings on my wisdom teeth as well but other dentists I've had said to extract or just "on watch". Is it normal to do fillings on wisdom teeth?

 

[Gordon]

It's just been a day so I'm still sore.... but is this a bad sign or just something else?

Nothing to do with your tooth, probably just after effects of having your mouth open super wide for an extended time.

Is it normal to do fillings on wisdom teeth?

Really depends on the situation, so yes, sometimes.

 

[Little tiger]

@Gordon I'm still feeling very nauseas today and been feeling weak. So I'm panicking if the filing failed. I'm waiting it out until Monday when the dentist is opened again though hopefully it'll fade by then.
I did had my mouth opened for just over an hour so makes sense for that pain. Thank your about the filling, I just ended up not trusting dentists very well due to so many bad experiences!