Aw, that's really uncomfortable talaga! Try warm salt water gargles, a few of us swear by that, and it really helps soothe the itching, plus it's safe if you're breastfeeding pa. You can also give honey (if baby is over 1 year old), warm tea with ginger, or just keep her hydrated with lots of water throughout the day. But if it doesn't improve in a few days or if there's fever or difficulty swallowing na, best to have her checked by the doctor para sigurado kung ano talaga ang cause, sometimes it could be a simple infection lang or something that needs proper treatment.