I'm a second time mom and I vowed to not replicate what I see as "mistakes" looking back on my first with sleep/nap training (I held my first baby for most naps until about 10 months old and didn't do any real night time sleep training...he didn't sleep through the night until age 2).
My second baby is now 6.5 months old and we started sleep/nap training 1-2 weeks or so ago, and it is going very well! Went from waking up every hour all night long (nursed to sleep to falling asleep independently). But, I'm starting to feel guilty about the crying that does continue to happen and looking for reassurance...
Current sleep schedule:
6:30 wakeup
9-10:30 nap 1
1:30-3 nap 2 (sometimes wakes after 30 minutes and will cry for up to 10-15 min and go back to sleep) --- I feel guilty during this
7pm bedtime (doesn't cry at bedtime but is waking up at 4am and crying on and off for up to 45 mins maybe even an hour...really don't like this)
12:30am dream feed
I'm mostly worried about the waking mid-nap and crying back to sleep and the 4am crying which is really hard and sad to listen to but it's on and off and sounds like "frustration" vs "help I've been abandoned!" I don't think she is super hungry because I dream feed in the middle of the night. Listening to her cry is very hard and I hoped that by sleep/nap training the crying would stop once she figured out how to go to sleep independently...I guess I'm wondering if it ever will stop?

Hopefully I'm doing the right thing by staying consistent.