Hello dear
It seems that you take things on yourself very easily which causes you stress thus leading to irritable mood. This indicates that you might be a sensitive person. When things are good you feel good or else your mood goes down. Try to avoid taking things on to yourself by distracting your thoughts to more positive ones. Also try discussing it with someone close so that they can help you when you are in stress.
Health Tips
meditate daily, meet people to socialize, engage in hobbies