scared i might’ve just gave myself a concussion

just hit the back of my head mildly hard on the bathtub (dont ask how lol) and even though it didn’t hurt and nothing crazy happened i INSTANTLY started panicking. head injuries are like one of my biggest fears ever. now im scared to fall asleep and also scared my brain is damaged. i cant tell if my anxiety is giving me a mildish headache (its just barely noticeable) or if it was from the hit. i also was able to resume what i had been doing immediately after as well. no confusion really just caught me off guard and made me immediately anxious. i keep touching the back of my head to feel for a bump but theres nothing. no pain either. anyway ik i would have to monitor symptoms for another couple days but im spiraling someone help😭