I don’t know what’s wrong with me. (TRIGGER WARNING)

Hello, I am 17 years old and i’ve never been in therapy and i’m not diagnosed with depression. But i feel like i was depressed in one point of my life. I had really bad health issues and i was struggling physically and mentally (i wasn’t able to walk, to eat, to sleep and it was hard to even communicate, the pain was all i was thinking about and most of the days i was just laying in bed). This condition lasted for about a month but it got to a point where the doctors didn’t know if i would make it. I feel like ever since this happened (it’s been almost 2 years) i cannot fully recover. Sometimes i get random feelings of sadness and i feel so lonely. Some days i don’t have any motivation and i just want to lay in my bed. I have no one i can talk to (i have great friends and family but they won’t understand this). I feel like i cannot control my emotions anymore (for example: i cry when i get a bad grade, i go crazy and start yelling when i lose something/break something even if it’s not that big of a deal). And it might sound mean or selfish but when someone is venting to me or complaining about something personal i get so annoyed. And sometimes most of the things they say really trigger me.

If you have any advice please help me.

Thank you for reading this.