I Feel Depressed. I Feel Worthless And Ashamed, Like I

i feel depressed. I feel worthless and ashamed, like I don't mean anything to anyone. I feel constantly judged and everyone is always irritated with me. I have thought of committing suicide, but I don't want to. once I find a flaw about me, I nail it and dig so deep it becomes "personal bullying" . sometimes when I get really nervous I will start shaking and I wont be able to stop. I cant breathe well and I cry a lot. I don't know if this is classified as depression but I wanted a professional opinion.