Please help, i'm struggling :(
Background if it helps:
Always done bath, into sleep bag, feed, story if not asleep with feed and dummy. Once asleep, put in cot.
By 3 months was going to bed between 7 and 8 and went through the night 3 times, other days was going until about 3 for her feed. Was very happy with this but only lasted 3 weeks.
Since dreaded 4 months hit:
Same bedtime routine, baby sleeps about 4-5 hours then wakes but she doesn't cry just groans and keeps turning over. She doesn't roll all the way and sleeps on her side but just rolls from back to side with her face into the mattress with her eyes closed.
The first time she wakes I assume food and feed and she goes straight back to sleep, put her down in cot then every hour from then until morning she will do it again.
I have tried putting her dummy back in, may work for 20 mins then she'll do it again.
Tried cuddling her back to sleep and putting her down but within an hour she'll do it again.
Used lullabies- do nothing.
Tried feeding each time but literally as soon as being but on the boob she will go back to sleep but wake again with an hour.
Even tried just leaving her but she will keep rolling and groaning with her eyes closed for up to 40 mins then finally wake properly and cry.
Why is she doing this and how can I fix it?
Can't be doing with the lack of sleep anymore :(