i hit myself so hard i gave myself a headache

i’ve developed a bad habit of hitting myself in the forehead whenever i get a bad intrusive thought. lately, i’ve been hitting myself like multiple times a day with genuine force. i have a headache right now and i’m realizing it’s probably due to this basic self harm. i’m so tired. i can’t believe i let my OCD get so bad that i hurt myself so much. i feel so ashamed.