Dental work

I am 8w3d pregnant and when I woke up this morning I have the worst toothache. Now I will say I am terrified of the dentist and have a few cavities that I need to get taken care of but I'm so scared. I tend to not tolerate the numbing stuff they use and can feel all the work which is painful. Has anyone needed to have cavities filled when pregnant? How did it go for you?