Baby wakes every 45 minutes at night — is this normal at 5 months?

This is the classic 4-5 month sleep regression plus a sleep-cycle length of about 45 minutes. It passed for us in around 3 weeks. Nothing was wrong with her.

What helped us was moving bedtime 30 minutes earlier and a very boring, dark room. Also check if she is genuinely hungry — ours was in a growth spurt and needed an extra feed.

Please get help with the nights if you can, even one night a week. Being that tired is its own problem, separate from the baby sleeping.