White tongue !

So my baby drinks formula, she is 7months old, she’s had a white tongue for about 2 days now, I tried wiping it off with a towel but it won’t come off only a tiny bit, she never really vomits after feeding but she is now, and she seems to be really hungry but when she gets her bottle she doesn’t like the milk, I know what her milk tastes like normally .. I thought it might be her milk because it has a funny taste but I just opened a brand new sealed bottle and it left my tongue a bit white too and a bit dry.. I’ve looked it up and seen that it might be thrush but I read that thrush doesn’t only affect the tongue but the cheeks and lips and stuff and she doesn’t have any of that ..

This happened once before when she was around 3 to 4 months old, and the milk tasted funny too so I just cleaned her tongue as I could and after a couple days it went away