Help! Possible yeast!

My female cockatiel Peca was recently diagnosed and treated with antibiotics for a respiratory infection. She doesn't really sneeze anymore or have any difficulty breathing. But what i have heard, those antibiotics can help develop a yeast infection. While she was biting my finger i noticed my finger being wet after, which has never happened before. I am not sure, but I think I might have seen a little bit of white on her tongue. She had a bit of yellow on her beak, but the vitamins that the vet gave to her were very yellow so I think its just that. Should i ring up the vet again or am I just being paranoid at this point? Is there any way I can treat it at home safely even if it turns out its not an infection? Any advice would help ❤