Having cavities plus tooth sensitivity clearly indicates that the cavity is too deep and there might be chances of nerve exposure. So, though you can take amoxycilling but i would strictly advise you to visit a dentist and get the filling done. After that go for professional tooth cleaning by periodontist.
After getting your treatment done, start using toothpaste that beats tooth sensitivity. And also start doing mouthwash gargles at least twice daily along with flossing. For more info visit the link...http://www.identalhub.com/articlecategory-gum-diseases-9.aspx
Free Dental Consultation