Metronidazole gel

so my doctor prescribed me this gel for my bv infection although i don't think it was that, anyways i took it as directed 5x each night before bed & i ended it on monday. it's thursday now, i don't have any discharge like there's nothing leftover in my underwear like it should be. should i be worried & call my doctor or is that probably just a symptom since it did clear & drain everything out?