Hello, this is my first contribution, so please be gentle!
Pretty easy song, but I'm not sure if it's perfect. It sounds OK to me.
Watch the Youtube video to get an idea of how the strumming goes.

Verse and Bridge:
C 
Am 
G 
Am (I'm not 100% positive about the second Am, it sounds like it, but I'm not sure)

Chorus:
F     C       G          C
 Last night I weighed my sin...
F     C       G       C
 Last night I weighed my...