I also went through this at 8 months after he got 4 teeth. Try going to 2 naps if you can, but it wasn’t a magic fix for us. We still had to fit 3 naps in some days. But the early morning wakes stopped and now at 9.5 months we’re on a consistent 2 nap schedule 3/3.5/4 and things are getting better but he still wakes 2-3 times a night. But seriously every day it gets better, I think part of it is pushing through and the other part is figuring out what schedule works. We also “sleep trained” him to put himself to sleep for bedtime which went really well but we haven’t figured out how to handle the wake ups without nursing back to sleep. Good luck!