Hey Tiff-
We actually are dealing with this at the moment. My 3 week old baby and I are hopefully getting over this as we speak. I had it with my 22 mo old when he was born, too. Both children did not have any major symptoms, but we treated it as if we did. Thrush is an overabundance of yeast and yes, it can be contagious. Not that it's a disease, but it can alter another child's natural "flora." Like, my baby and I can pass it to and from each other (he's nursing) if it's not taken care of. For me, it showed up in the breasts and makes nursing a bit painful until my natural flora is restored. If you feel comfortable, you can go the medicine route, but be careful. The medications for the children are pretty intense and toxic to their system (especially so young, but your dr won't tell you that. He/she will tell you it's fine...). Thrush can hurt your daughter in that it can give her a sore throat and can make eating frustrating and difficult. But it's hard, of course, for her to tell you that. To help the process along more quickly, give her a major boost in her immune system to knock out the yeast and restore her natural flora. Do this by giving her some probiotics...have you heard of these? You can give her some Keifer (organic or not...you can find this at Trader Joe's or any other grocery store). This has natural "good bacteria" (probiotics) in it. Have you given her milk yet? If not, I would wait on this, then. It's like a yogurt, but much much much healthier. But if anything else, go to Whole Foods and buy some infant probiotic powder (get the refrigerated kind) and mix this with some formula or breast milk if you're still nursing. The bottle will tell you how much you can give her. Do this regularly (daily) and it will restore her body's natural balance and won't be toxic to her system. Plus, it will give her immune system a nice jump start for the flu season!! And keep doing it, it's soo good for her! I give my kids probiotics daily and it helps protect them from getting sick so often! Let me know if you have any other questions... :)