As you are still taking the medication the doctor has given you, you need to carry on with this. You may need another does, see how it goes.
In the meantime, I suggest you see your doctor with regard to the blister spots, this may or may not be connected. They sound a bit like chickenpox. But the doctor will be able to diagnose what they are and if they are part of the fungal infection. You may benefit from an antifungal/antibacterial cream to apply to the skin.