What did 4 months sleep regression look like to you?

Currently in the thick of it. Baby is almost 5 months old but it seems like it has lasted from a long time. So this is how it looks like for us. Bedtime is 8 PM, desired wake time is 7 AM. If we are REALLY LUCKY (happens maybe once a week) that day she gives us 3 hours stretch till 11 PM. After that she wakes up LITERALLY EVERY HOUR. I’m not exaggerating when I say every hour. It’s EVERY HOUR exactly on the dot.

We are looking into sleep training the baby. My mother tells me we weren’t like this when we were young and she hasn’t heard about this in her times. I’m hoping to hear if this is common or our baby has serious FOMO on life.