No sleep 😓😓

My daughter is 6 months old.

She used to sleep amazing. Went down at 7pm, slept until 2/3am. Then back down until 6/7am.

But the last 3-4 weeks have been awful. She’s awake every half an hour / hour all night. I’m tearing my hair out and I don’t know what to do. I’m exhausted and at breaking point.

PLEASE someone offer some advice.