Last week, approx. Wed. 8/5, I started having a problem with my sinuses. I was taking sudafed. Friday, 8/7 i started experiencing a throbbing sensation in my bottom tooth. I did the salt water rinses, listerine and developed an ever so slight abcess (very tiny). It broke and bled just a tiny little bit. I started taking motrin because it hurt and throbbed (no swelling in cheek). Sunday, 8/9 I went to a walk in clinic (medical) and they put me on amoxycillin 500 mgs (3 times a day). It's now Tuesday, 8/11 and I still have the throbbing in my tooth and it's sensitive to touch but not sensitive to hot or cold. I'm just tired of it. I called the dentist but can't get in until 9/8 and they told me that I would have to finish the antibiotic before they would do anything. According to them since this is only the 3rd day I've been on the antibiotic it still isn't thru my system and probably won't be for a couple days yet. Is this true? What else can a do to relieve the throbbing sensation in my tooth until my dentist appt.