Peritonsillar abscess - any medical peeps?

I saw the out of hours GP on Saturday afternoon with a very painful sore throat, talking was painful and it was affecting my speech and ability to eat/drink. She prescibed a pencillin antibiotic (phenoxymethylpenicillin 250mg 2 tablets 4 x daily x 10 days), she did suspect their could be an abscess behind my right tonsil. Anyway Sunday I felt worse until the abscess burst (yuk) and now the pressure is off I feel much better. My question is should I go back to my GP for a follow up, is this antibiotic enough now that I know it is an abscess, and is it ok for it to drain on its own with out causing me any ill effects?