Newborn won't Sleep on Her Own - Advice from Experienced Mothers PLEASE?

First try a cotton swaddle blanket. It's a wearable blanket. It will keep her nice and secure like if she is in your arms. Also buy a security sleeper. Your scent close by might help. My daughter was the same way. When I placed her in the safe sleeper she slept longer. If she started to cry I would just reach my arm over and pat her bottom or rub her head and she would go back to sleep.