You are not alone
She's nearly 6 months how is her head control? Because if good enough give it another 2 weeks and try her with a banana before bed
If white noise is no good try - pink noise, brown noise, music, oven sounds, womb sounds, hoover sounds, etc
Take her pjs and blanket/wrap/sleeping bag and have it in your bare chest for half hour or so before bed to get your scent on it
If you wrap her for bed maybe try sleeping bag or visa versa, if you swaddle with arms in maybe swaddle with arms out etc
Footless pjs- some babies hate their feet feeling restricted
Lavender scent on the room - heck put lavender sounds in every room
Lavender Baby moisturiser
Gripe water before bed
Check she's not teething unlikely but could be and use anbesol if so
Night light/glow stars on the walls/ hanging mobile
Dummy/no dummy or try a different shaped test dummy
Try a different shaped feet bottle
Cot sleeping or next to me crib
Room temp - 15-20 degrees seems to be good for most
Is there a draft ? Is her sleeping spot too warm
Tilt the mattress - check with gp first
Some babies start sleeping better once they move into their own room (if she's got one) so not long until she can go in there and she won't hear every movement you do and visa versa
Is she getting lots of fresh air a day?
Humidifier? Dehumidifier?
As for you ..... self care
Husband needs to take the baby out on the day for an hour so you can sleep
Ear plugs for the night when it's his turn
Face masks, hair masks for you and why not your husband too
Get paper plates and cutlery for a few weeks so you don't have to worry about doing the dishes
Yoga / Pilates on YouTube
Cry if you need to cry
It is so hard and many of us have been there or are there too right now. But it will get easier