Hello There, So I'm 17, I'm Overly Stressed So I

Hello there, so I'm 17, I'm overly stressed so I think this may be the reason, but I keep blacking out for like, less than a second. Its like I blink but get this weird feeling and everything is black for a split second and I'm find. If it lasted any longer than it does, I would fall into the floor, but it's not long enough for me to not still be sitting upright. I've been getting extremely dizzy and I can't stay standing without having to at least lean on something for long periods of time. I can't yet go to the hospital due to having to work and whatnot but I plan to soon. I would just like an opinion on this as well. Note: I also have high anxiety and panic disorder along with everything else. If I can get a reply soon, that would be very wonderful. Thank you c: