Don't worry - I won't tell.
You're right though, Christians are not supposed to broadcast their good deeds.
Matthew 6:1
"Be careful not to do your 'acts of righteousness' before men, to be seen by them. If you do, you will have no reward from your Father in heaven. 
Matthew 6:3-5
But when you give to the needy, do not let your left hand know what your right hand is doing, so that your giving may be in secret. Then your Father, who sees what is done in secret, will reward you.