I always thing i screw up!

Ya i am like you only. I do the same. I was not like that before. For the past one year I am facing so many problems continuously. During this period only i started blaming myself and now i feel inferior about myself. I have to come back to normal.

You shouldn't always blame yourself. Blaming yourself doesn't help in correcting your mistake. When you do something wrong, you should learn from your mistakes and make sure that you will make better decisions. When you make a mistake in the future, take it as a learning experience. Focus more on the things you did well. Don't take things too seriously, all mistakes happen so that you will never commit them again.