Maybe a yeast infection?

You are correct, Antibiotics DO cause Yeast Infections in women. I cannot take Penicillin because it will give me a l Yeast Infection every time. Go to your local Pharmacy or even WalMart and buy Monistat and start using it. They have the Cream or the Suppositories. Be sure and continue to use the Monistat as long as you are on Antibiotics.