<human>: Can you succinctly summarize the text in 1-3 sentences?

I am a new father. I have a 7-7 1/2 month old son. My wife and I tried doing the Ferber method back when he was about 3 months old. He cried almost 5 hours straight and it scarred us and so we were very cautious and slow with sleeping training. About 10 days ago, after turning 7 months old, we decided to give it a try. 

We put him in his crib and about 55 minutes later, he went to sleep and stayed asleep for a few hours and cried and went back to sleep. Miracle!! Next night, we read that he should take half the time to sleep. 15 minutes until he fell asleep! Miracle #2!! The next few nights, he was anywhere from 35-50 minutes. Definitely not taking half the amount of time to sleep...

The past 4 nights, he cries in his crib for 1+ hour. He sleeps well through the night except maybe requiring 1-2 comfort boob feeds, but I'm starting to get concerned on why he is taking so long to fall asleep. During the day today, he has been extra needy, i.e. we can't go from the living room to the breakfast room without him crying. When I go get him in the morning, he wakes up crying and of course immediately stops crying when I pick him up.

Did we do something wrong? Is there anything we can do to fix this?

Thanks reddit!
<bot>: 7 month old takes over 1 hour to sleep. Having separation anxiety during the day if walk away 10 feet. How can we fix this?