bassinet troubles?

My 3 week old baby girl literally will not sleep in her bassinet.. she will sleep for hours in anyone's arms, through any noise..  but as soon as she's set down in her bassinet she's fussy, awake, and crying. And is up every 1-2 hours. I tried cosleeping and wasn't a fan and she wasn't either. At first she wouldn't sleep without being swaddled either but now she's outgrowing it and will fuss in her swaddle, and will only sleep with a blanket. I put her in her bassinet with her blanket and she sleeps amazing, for hours.. letting me get sleep! But she always rolls onto her side and I heard it's a safety hazard to have a blanket in the bassinet so idk what to do.. does anyone else do this or have this problem? I need advice and recommendations! Pictures help.. I'm sleep deprived and exhausted. My SO is in the navy deployed btw so I'm all on my own taking care of her.