There is nothing wrong with feeling angry, the problems that come from anger are always a choice! What are you going to do with it, are you going to yell, be mean, get even… or just think about it and mull it over in your mind? None of those will lead you to a blessing. Or, you can get help from the Holy Spirit to exercise self-control. That is a key to successful Christian living. We work to operate by the Spirit instead of the flesh. It isn’t always easy and we all have our struggles, but the Lord is with you. He expected us to struggle with it - so He gave us Scripture to help:
““Be angry, and do not sin”: do not let the sun go down on your wrath,” Ephesians 4:26
“Be angry, and do not sin. Meditate within your heart on your bed, and be still. Selah” Psalms 4:4