Broken tooth

So I appear to have broken part of my rear molar. The tooth is broke but I don't think the gum/root is exposed from what I can see. There's absolutely no pain which I find weird.

My dentist doesn't have an appointment til Monday afternoon.. I guess I'm asking /hoping that it's OK for my to vape my MC? I'd rather not go a weekend without it and I intend on regular salt water rinses and mouthwash.

Any advice? Cheers!