Depression or just pressure? Please Answer :'(?

Here's what you do first you should try to get more sleep. Cause lack of sleep has in definitely caused you to have lack of focus which is probably been the main reason behind you grades falling. The depression also comes from lack of sleep I can see, how do I know this, I went through this type of thing myself when I don't get enough sleep. So get some sleep, cause it helps your brain function better at least 8 to 9 hours and you'll be fine:)