Isa-

My kids don't routinely sleep through the night (and I would count 7-8 hours as through the night) until they are 4 or 5. My seven year old still wakes in the middle of the night about once a week and needs reassurance from me or Dad before she goes back to sleep.

If they ever slept ten hours, I would have to keep checking to make sure that they were still breathing!

Sorry, no reassurance here, but plenty of sympathy.