Hey...send advice

Basically, i am not sure what to do...i have a bunch of thoughts gathered in my mind. giving me headaches, making me go off my appetite and making me lose my motivation. this has been going on for a while, su!cidal thoughts have also gone on for a while and at this point i'm not sure what to do. I have done all i can to cry out for help but my parents have not noticed. I want help before i do something dumb.