Babies Eye

My baby is 3 months old and her left eye has been watery with greenish eye boogers. I took her to her pediatric and gave me eye drops to put on her for 7 days.. after those 7 days passed her eye was still watery so I continued to apply the eye drops on her has now been a month I believe and her eye is still the same... has this happen too anyone else? I herd breast milk helps but I no longer have any/: what should I do/: I feel so bad for her😣😭 thanks in advanced