Don't take antibiotics unless you have enough to do an entire cycle (hint: they usually don't perscribe more than one cycle) You probably were supposed to finish your dog's cycle as well. You could end up with a nasty, resistant sinus infection (not too fun). Try a free walk in clinic. If it is a sinus infection hopefully they can give you enough free samples to get you through a cycle (hopefully a Z-pack). Hope you are feeling better.