u/Candid-Area-1822

Just turned 5 months
I try to do 2/2.5/2.5/3
Rocked and BF for all naps
Wakes up in the middle of the night usually can put herself back to sleep but I still do 2 feedings
Started Ferber 2 weeks ago, she still cries when I put her down the most is 40 minutes but no less than 7 minutes
She takes all naps in the crib so that means sometimes they’re short but I still try to follow her take windows and then just move bed time up if it’s a short one
My question is why is she still crying when I put her down to sleep? Is this normal? I figured the crying would decrease everyday but some days it’s 7 minutes some days 20 or upwards of 40 with 10 15 20 minute checkins