im 20 yo, and i feel like I'm just gonna be one of those people who died at a young age, and honestly i can't function. like i wanna do so much because I've already wasted enough time of my life failing (Failed 3 years of school in a row and now I'm on my forth and last try to pass) and i feel like I'm not gonna live to achieve any of the things i wanted.

Is this a common sort of anxiety or is there something wrong with me idk ? 

AND I know it's silly, but i honestly can't stop thinking about horrifying looking shadow creature's aswell, killing by giving me a heart attack by just appearing from nowhere. 

Should i see a therapist ?