The Spawn slept in a small bassinet next to me for the first 4.5 months. During that time I could reach over as soon as she fussed.
Everything woke me up.
Things that never woke me up did.
The first few nights I had the baby monitor on. And I think when The Spawn would sneeze it would wake me.
I learned that first week to turn OFF the baby monitor. Never used it since. Mostly because we have a small place.
The Spawn was a sleep talker. She also would fuss sometimes and go back to sleep. I didn't need to hear either.
You can hear the difference in your child's cry. There is a definite difference to “I'm tired and up, but don't want to be” cry versus the “I don't want to be by myself” cry. The first I learned to ignore so she would go back to sleep, the second I would go get her.
Have you heard of night time diapers? These are specially made diapers with extra padding for longer sleep periods. Someone gave us a bag.
They are expensive!
Side note... Diapers are really expensive but I found Baby Cheapskate early on and has bee a money saver.
I started using one size up diapers and got the same results.
That also made me watch prices for the bigger diapers. I could snag them in bulk if a good deal happened.
The bigger diapers definitely helped for a longer nights sleep as she got older.