Co sleeping, help needed

Co-sleeping. I need help!!

I made the silly mistake of letting baby in bed with me. It was just she wouldn’t settle in her next to me cot..

Well now she is old enough 7 1/2 months till go in her big cot. She would take naps in it but she when it comes to night time she won’t sleep 😩😩😩 please I’ll try anything!!