What do you think about this??

Hi! I’m a FTM & some nights it’s very hard for my 12 wk baby to go to sleep. I’m SAHM but my husband works & leaves very early so I was trying to see if it’s okay to use this for night time & only on the days where she doesn’t want to sleep. Some of the nights she goes to bed between 8-9 but other it’s past 11 & she’s awake. She still doesn’t sleep through the night so idk if that matters🤷🏻‍♀️ but she does sleep a whole less during day time she can go between 3-5 awake after feeding which our pediatrician states it’s totally normal that she should sleep less, but by night we both are tired but she won’t sleep even tho she’s tired so idk what I’m doing wrong. Has anyone use this before?