Hana, please read the posts.
My daughter went through a stage much the same. She was just drinking more, and very active.
She's screaming because most likely she's thirsty, not because she's a brat, so don't worry.
Give her all the fluids she needs, there's no fun in drinking, and thirst can be very painful.
She might have a small infection, she might have the flu, always makes me feel thirsty.
She won't drink because it's fun, she drinks because she's thirsty.
My daughter's 18m/o now, and perfectly healthy.
Hope everything's okay, and try not to worry until you see a doctor. It could be many, many things, or absolutely nothing. Best wishes.