I was on clindamycin for two and half weeks.............. I t also helped with my symptoms as well. Why won't THEY give you that Antibiotic if it really has helped you that much? I have also experienced the same when asking to be treated with any Antibiotic , especially Ceftriaxone..........
Anyway why don't you just order some more clindamycin if it really helped you (luckily it is still one of the meds you can acquire in pill form)? Did it really get rid of the white coating on your tongue with the little metallic tasting red patch in the middle? I am assuming after you stopped taking the Clindamycin the white tongue returned?