@Frankie there’s nothing on her tongue and I’ve just switched her to size 3 teats cause she was sucking quite hard on the size 2 so she might have got some blisters after sucking so hard
I would ask a pharmacist, they are brilliant at stuff like this
It could be milk and I found out a couple weeks ago babies do get sucking blisters that don't really bother them. My daughter had thrush not too long ago and it look nearly identical they will often have it on their tongue too if it is thrush