How well I can relate. We are but human and sinners at best. There was never a promise that we would be perfected in this lifetime.

Apologise, no matter what apologise. This is a good thing. It says that you realise your mistake and that you are repentant. God is in the business of healing and He will heal the whole situation, you are forgiven for sure because anyone can see how rotten you feel. Don't beat yourself though. This a trick of the enemy.
Love your sis in Christ. 

Chacha,

There are many mistakes we make in life, some of them we have to live with. Just take this as an opportunity to learn and be prepared to face the consequences. We can still pray that nothing will come out of this, but if anything does, God can still turn things around for us. Don't fear or worry and just cast this care to God.

Father in heaven,

I lift up chacha and pray that You will protect her. Secure her job and let her find special favour with her boss.

In Jesus' Name, Amen.