I recently had 2 fillings on 2 teeth next to each other near the back of my mouth, one of the teeth had 2 have a route canal then be pulled out, now the other tooth with the filling is really hurting (just like the one that got pulled)

i went to my dentist today and he just gave me more antibiotics, does anyone realistictly think this will get rid of the pain?

I know theres a possiblity its still just a bit infected but it feels more serious than that, and the tooth is right next to the pulled tooth,
im going to a new dentist on friday but if anyone out there has had a similar problem and the antibiotics worked, or didnt, id love to have a bit of reassurance......

Thanks!