I went to the vet and sais that her inner theaths are curved and its hurting her tounge. He trim the teaths but she is still not eating the hay and the pallet. But i'm not satified with the vet because he just check her mouth nothing else. I mean tammy, body, eyes ets.
This is called malocclusion. I just lost a guinea pig to this about 2 weeks ago. If she isn't eating then please go back to the vet for some Critical Care (the powder she was "trying to sell you"). She will need to be syringe fed. Also, she will likely have to have her teeth trimmed regularly for the rest of her life. It is extremely important that she have a constant supply of hay to eat. Not only because guinea pigs need it to keep their insides moving, but because it'll help grind her teeth down.
I don't want to alarm you, but pigs go downhill very fast. My pig died from this and I diligently syringe fed her and brought her to the vet twice in a week. I believe now that my pig had an undiagnosed heart condition that the vet thought was a respiratory infection so your pig may have a chance, but you need to take this very seriously.