Hi I’ve Been Taking Clindamycin That Was Prescribed To Me

Hi I’ve been taking Clindamycin that was prescribed to me from the dentist. Been taking for 6 days but took on Wednesday and held under my tongue until I made it to the kitchen for water to wash it down. Took longer then I anticipated to get to the water and pill melted under my tongue. My tongue is red and hurts under it. Fills like its burn.What can I do about it.