Hey. If you’re not enjoying physics, definitely swap it out. Is core maths an a level? Or BTEC? I’d look at swapping physics for an A level, rather than a vocational course. Something like psychology would be a good idea. That being said, I’m applying to medicine this year with bio, chem and history so really, the choice is yours as long as you already have bio and chem. I don’t know any unis that specifically want physics, usually they just ask for biology OR chemistry and another science, which you already meet taking both bio and chem. Dropping physics won’t negatively impact you in anyway as a future dentistry student, as long as you take another a level and not a vocational as unis want 3 a levels for dentistry. Hope this helps and good luck on your journey!