H.1.
My son has had night terrors from about this age on. However, this doesn't sound like night terrors. Night terrors are typically a few hours into sleep because of their sleep cycles and when Henry is having a night terror, he wouldn't even touch a bottle or anything else for that matter. You would know a night terror because she would look right through you and nothing at all would console her. These also shouldn't happen multiple times throughout a night.
It does however sound that something is bothering her if you said she used to sleep through fine. Also, I say this because you say she is screaming madly...I would think if she is just forming some nasty habits of getting attention at night then she wouldn't be screaming as much as waking and wanting to play. But please do be careful of this....
Is she teething? Try some tylenol before bed. Teething tablet when you go to her?
She does NOT need a bottle at night (or anytime for that matter) at her age. It appears for whatever reason it is comforting her back to sleep. If crying it out has not been working (are you being consistent????) then please consider trying some tylenol or a doctor check. Perhaps her ears are bothering her. Whenever my son doesn't sleep well, we go have his ears checked for infection.