Baby still not sleeping?

Kristina • Married ❤️ Baby Girl born 10/17 Baby Boy born 10/19

My baby is EBF, she started sleeping through the night at like 5 weeks. Starting at 4.5 months she WILL NOT SLEEP. Seriously she wakes up every hour to hour an a half, sometimes every thirty minutes . Rarely do we get stretches over two hours. I’m getting desperate but don’t believe in CIO. Any advice? She’ll be 6 months Tuesday.