If a tooth is hurting, can I take antibiotics instead of having to do dental work?

Check with Dentist. For my OB patients that have dental/gingival infections or require antibiotics after a dental procedure, certain antibiotics are safe to take while pregnant. However, if your dentist/dental surgeon feel that the problem you have requires a dental procedure, antibiotics will not take the place of that. Continuing good oral hygiene during pregnancy with regular brushing and flossing is important.
Toothache. It depends on what is causing your toothache. Antibiotics can help if there is an infection like an abscess. If it is caused by a big cavilty or a crack, antibiotics will not help.