Not wanting a bottle😢

My baby is 6 months old and today she is not wanting to drink a bottle. She tried to drink 2oz and that was it. She has not had a bottle in 6 hours. But she wants to eat food and suck on her teething toys. She does not have a fever nor any other signs of sickness. However her poop has a weird texture. Could it be the heat or should i try some cold water? I am a new mom and i am just scared.