I would speak to your OB to confirm.
if your* ...Sorry had to correct myself. I guess I am a little OCD about not sounding right when I re-read something I've typed LOL
I am not sure but I would verify it with your actual doctor taking care of your prenatal care.. they should be aware of anything you are taking
If you dentist told you it would be fine, then it is. But, if you want a second opinion, call a pharmacy or talk to your regular doctor. Only take the dose recommended. Congrats on the pregnancy.