Good morning, it's almost six months. We've been battling with our dau…

Good morning, it's almost six months. We've been battling with our daughter for three days now to get her to eat. She usually ate 180 ml of porridge three times a day. But she refuses to eat it. The most she can eat in a day is cottage cheese (50-80g) and porridge (130ml). She drinks water and diluted juice though. She drinks water and juice calmly, but as soon as I give her a bottle of porridge and she takes a sip, she starts gagging and crying. The porridge isn't hot or cold. We've already changed bottles, nipples, and porridge. I don't know what to do anymore.