Mental depression. Angry with ever!

Hi, iam working in a bpo in a finance project. For the past 1 month iam getting more angry and iam scouting everyone and fight with the closed one unknowingly. I have more debts all my salary going to it. In mean while my parents both are suffering from a medical issue my father had a stone in digestive system and my mother is affected by blader cancer. I have one brother and one sister ( not born sister) my friend iam treating her as a sister. For the past one week iam fighting with her only and with my parents, and with my office colleague. Due to this fight with my sister one day I cut my hands., I don't have drinks habit but I had that day. I don't when she was with her friends closely I got angry and got joles. Because of that I had a misunderstanding with her. She treat everyone as his brother only but I told bad about her credibility to her itself. This leads to a night fight. If she is not speaking one day also I feel like getting mad and unknowingly Iam getting angry with ever