Oh, I totally feel for you!! I had both my bottom wisdom teeth removed while pregnant (years apart, tho) and they were both terrible experiences, sorry to say, mainly because they can only use local medication I think a top would've been a lot less painful b/c most of the pain was from the pushing down on the jaw.
Hopefully this doesn't matter to you tho, b/c yours is a top tooth issue. If it's bottom, tho, I'd get them to try every possible alternative, hon.
Good luck and let us know how you go!!