Last night I heard bells or chimes when I woke up
There isn't thing in my house that made this noise
Happened to me twice(woke up two times)

Here's what it was like:
Woke up(somewhere at 2 a.m. and 6 a.m.)
Heard chimes every 1 sec
DING-1 second-DING-1 second-DING-1 second-DING

It slowly faded after the first 2 chimes