I'm so sorry to hear about this, but to the question: I wouldn't be so quick to say your depressed, yes I would say this is a very hard time in your life right now. And school/ marks doesn't help. My suggestion would be you need to relax with school just a bit, marks are important but it sounds to me it is driving you into the ground. If you continue to do this it's just going to get much worse. You would be surprised how beneficial a small break can make you feel. As for the rough patch, there's nothing much more you can do then just move on in life. This is going to be super hard to do but your just going to have to be tough. Also if you can, talk to anyone. It makes you feel a lot better just sitting down and talking. Try to focus on the positives in life right now! I hope this helped and again I'm sorry to hear about this.
It is not nice to deal with something like that but there is someone that can help you. His name is Jesus and He cares so much for you. If you would only call out to Him He would show you that love. Sometimes people go through things and it makes them stronger, you're already doing well keep going and connect with God.I know you can do it.