I left my country to go to another one for studies, I got a scholarship to do a phd in math. I used to be a brilliant and a hard working student but since I came to this this country I don't know myself anymore. I became very ineffective, I don't do job well, I don't work as hard as before, I have hard time at adapting myself to this new life. I've always been with my family, it's the first time that I've left them and I didn't expect that it'll hit me this hard. I always feel like a failure and I don't deserve to be here. Sometimes I get very depressed to the point I start imagined how worthless I am and how the world would not move an inch if I kill myself. I have only dark thoughts in my head. I want to be the person I used to be. I want to be motivated and hardworking again. Help me please.