transitioning to crib

UPDATE: I let her sleep in the crib last night.she woke up at 2am, had an entire 6oz bottle, and went back to the crib until 5am. then had a 4 oz bottle... and slept again until 7! I call that a win, even though it wasn't all night. no crying! :) thank y'all for giving me courage!

so, my baby is almost 5 months. she has been sleeping in her bouncer/swing since about 6 weeks old. she had awful reflux, I had my reasons. not looking for judgement. believe me, I know.

for about the past 3 weeks, I've been letting her nap in her crib. I'll even put her in her crib when she falls asleep at 8 p.m., but then get her up and put her in the bouncer chair for the rest of the night when I go to bed around midnight.

she usually does this okay, but occasionally wakes up to eat before going into her bouncer.

she sleeps pretty consistently from 8 p.m. until 5 a.m..

I want to start leaving her in her crib the entire night.

my question is, how pissed is she going to be the first night she realized she stayed there all night, and wakes up alone?