Tips on getting 3 week old to sleep linger stretched at night?

I am to say the least exhausted.

My 3 week old will fuss and be awake all night or wake up every hour at night and sleep like a freaking angel during the day.

I tried everything. Daytime naps in the light/nightime in the dark. Bath before bed etc

She will sleep just fine swaddled in her bassinet during the day but will cry and fuss all night if swaddled and put in bassinet.

I am tired and jn tears…. I should mention its just me raising her… so no help is around.