3 hours ago while overhead pressing a 45 pound barbell, i clipped my chin on the way up. i did not lose conciousness but now i feel slightly dizzy and mild headache. could it just be from being so anxious? is it safe to wait it out or should goto er?

Health anxiety?: Like any anxiety disorder, health anxiety or hypochondriasis should be followed by one's primary care doctor and perhaps a psychiatrist or psychologist. Regular physician visits, group therapy for support, and cognitive psychotherapy focusing on realistic beliefs about disease are all part of treatment. If hit really hard on the chin, such as in martial arts, the ER can take a look.