A wrong decision made me lose too much, and now I regret my irritability every day, which seriously affects my physical and mental health. What should I do if I am so tired?

What you lost will never be yours again. There is no regret medicine in the world, and heartbreak will only ruin your life. It is better to cut the gordian knot and get back on your feet than to regret it. The road ahead is still very long, so you need to assess the situation. People must accept all kinds of hardships and pains from the day they are born. Everything will pass, and everything in the future will be better than now. Believe in it, and you will have a healthy body and mind to embrace a bright future.