Why do all of my bottom teeth feel sensitive and pain after an upper wisdom tooth extraction?

Its been 4 days now that i had my upper right wisdom tooth pulled and i'm still in pain and now after cleaning my bottom teeth with floss, they are hurting and are sensitive. I can hardly eat anything with my left side because it is still like hard to swallow... what can i do for pain..have drank 2 Panadols every 6 hours for three days now and i only get about 2 hours of relief. Area was checked by dentist after 3 days and dentist said all looked fine and gave me an antibiotic (amixicillin 500 2x a day) started them yesterday. Please tell me why my bottom teeth feel so sensitive and pain and what can i take (instead of Panadol) to relieve my pain and discomfort?