Lol...I think we all go through that stage!! The "oh no, is she still breathing" panic!!
Oni only slept on her belly so I was 10 times more paranoid!!
She only co-slept when she was sick.
Her .Daddy looooooved having her sleeping with us, but I kicked her out! :p
for awhile, I let her sleep in her play yard. It came with a bassinet attachment that had music and vibrations. It was the sh't!!
Don't feel bad that she's alone in her bassinet. She's fine

. I know it's easier said than done, but I promise, you'll start feeling better about it!!
Plus, you don't want a 3 year old in between you and your man later on...Phew, i'm glad I kicked .Oni out...I needed me some .Daddy loove! Hhehehe!
Sarah