Useless

I can't really define myself really much. I don't know who I am now. I think I have changed a lot since I started to study here. I am getting lost from one day to the next another day. Besides, I simply can't simply take care of myself. I don't know why this keeps happening to me. My Japanese tests are also getting worsen especially  grammar tests. I just think I lost my common sense. Everything is not going to be easy to for me. I am prone to make the same mistakes everyday, and I still can't rectify my problems. Is it sign of stress or what? I don't know. Hopefully, this agony will end as soon as possible and I don't want to mount the problems nounting everyday.