Social anxiety. Then i took help of p!

I'm a college student and suffering from depression. Life seems meaningless. I am having no interest in any activities. My exams are approaching and I'm having no interest to study. I have no friends. I feel very very lonely. I go to college, sit there and just came back without talking to anyone. I feel very uncomfortable there. Sometimes I have headaches also due to excessive overthinking. My mind is full of confusions and there is no peace. When people talk with each other, I feel that they are making fun of me. Because some college students had made fun of me due to my loneliness. I'm a shy type of person from my birth and suffering from social anxiety. I had few friends in every stage of my life and talk less to others. But still I was happy and never had these symptoms. In college, I had 2 -3 friends. But one day, I got fight with them and I get separated from them. Since I had no other friend, so I get isolated and depressed. They starts making fun of me. Then I took help of p