I need help with a problem

Hi I'm 16 and in 10th grade and I have wrestled for around 7 years. Recently I have been doing off season tournaments. I usually do well but today I let one loss get to me so much that I lost the rest of my matches. This is not the first time this has happened now my parents are mad because I for fitted my last match. I need someone's help on how to deal with my problem.