My 4 month old has had thrush since she was 2 weeks old. We've been on 3 rounds of Nystatin and it doesn't work. All it does is give her gas, vomiting and a lot of crying. I just tried gentian violet and it seemed to work, but now 4 days later the thrush is back. I've tried probiotics for both of us, vinegar rinse for my nipples, canestan for nipples as well (I don't have symptoms on my nipples but I am treating anyways). Please help! Does this ever go away?