Depression

I am a psychology student and I have just finished a unit on depression. I can relate to almost all the signs of depression I have to learn about. I am worthless, I intentionally distance myself from my family and friends as I am a burden, what’s the point I trying if I’m insignificant in the grand scheme of the world, I am never going to amount to anything, I don’t want to eat cause I don’t have the energy, I don’t care anymore, I am constantly tired and just recently I have started self harming again but worse than before (cutting). I cant remember when I dodjnt feel like this. But only recently I have started cutting, 2 weeks, but my mood has dropped so much family and friends have started to notice. Before I put on a front as I didn’t want them to think was different but now I don’t care. I also think of suicide but I don’t think I would ever go that far. Having to learn and revise this has only made me realise that the way I’m feeling isn’t ‘normal’. But as I revise it just makes me feel worse and want to cut deeper on my thighs. I think I do want help but my dad is very backwards thinking with mental health and I don’t know who to reach out to. Any advice? Am I depressed or what am I?