I'm another one for Dr Nicholas & Asp (Dr Bickerton in particular).
Some dentists (most) don't like doing any work to a pg woman because giving anaesthetics isn't recommended (and who wants to have a filling done without one?!), but if it's an emergency, it's an emergency.
I go to The Clinic in the DIFC, I've found both dentists there to be really good and not too expensive. I'm also pregnant (26 weeks) and am going to see them tomorrow, as long as you are over 12 weeks they had no issue seeing pregnant ladies. Good luck and hope you get sorted soon.