Do you help the baby go to sleep at bedtime (e.g. rock to sleep, feed to sleep)? At that age at bedtime and/or any night time wakeups we would let the baby cry for up to give minutes. If the baby didn't stop crying within five minutes I would turn the sound machine up, wait 2 minutes, if that did not work I'd put my hand on baby's chest for 1-2 minutes, if that did not work I'd jiggle the baby's chest with my hand (baby still in crib) for 1-2 minutes, if that did not work I'd give baby the pack, wait 2 minutes and if that did not work I would pick the baby up and cuddle her.
Another tip I heard about pacis is to take it out of baby's mouth while they are falling asleep so that it falling out does not wake them up.