Update:

Thanks for all the replies.

Saw our family doctor. He is almost 100% certain it has something to do with the medications and suggested I see my psychiatrist asap, and a different dentist.

He said it could possibly be the setraline, olanzapine or even the flupentixol. Could be a accumulative effect of multiple drugs.

So my psychiatrist will just have to change something; if it causes so many issues; wear of the teeth, sensitivity, muscle aches... medications do have side effects, but some are just outweighing the benefits; there are alternatives. He said the Zoloft in particular, but there are alternative SSRIs.

On the topic of other SSRIs, what do you all have experience with? I know in the SSRI group we have citalopram, escitalopram, fluoxetine, fluvoxamine, paroxetine and of course setraline.

In terms of venlafaxine: I do not see why we cannot drop it as I am only on 75 mg and other medications have been put in place.
I'll hear what the doc has to say.