hey im new and i need some help!

hey guys, im rio (she/her) and am 17. While ive never been formally diagnosed with depression, i think i have it -- most my my symptoms match up with the criterion from DSM-5 and they have been persistent for almost a year now. To sum myself up, I constantly feel empty/drained/sad for either no reason or when I'm in a situation in which I feel helpless and worthless, which is pretty much most of the time. My self esteem is embarrassingly low and I literally hate myself, and compare myself to others, personality and physically speaking. I wake up everyday dreading the day and spending my time isolated in my room. I also find everyday activities like doing prep a lot harder as I lose interest and motivation in everything that I do. And when I'm happy, I'll suddenly think of something and that immediately puts me back into a low mood. I know this isn't a formal diagnosis but do you think I might have depression?