I don't even know

lately (well most of my life these past few months) i have this rush of feelings that i don't even know what it is, i feel sad but i have nothing causing it i literally was hanging out with friends just a few hours ago, now suddenly i don't wanna do anything can't even bring myself to play video games or nothing. and all these thoughts of the future and past that i know for a fact i can't do anything about it and i should just control what i can at the moment yet i've been stuck thinking about it. I also feel this dread of something i don't even know, entering college... is this really it? is this all life has to offer? what do i do then? can i make it that far? i just i don't know im now just talking crazy what am i even saying, when i type these thing and look back at it i feel cringe, then the next night comes around shit happens again over and over and over again. when i wake up tomorrow i know i'll be fine, i'll wake up like nothing happens then shit just hits me from out of nowhere, i feel sad, angry, bitter over what? i don't understand wtf is this shit?