Headache during and after breath meditation

I face headache during and after breath meditation. I have observed that i do forced breathing to quiet my mind during the meditation and the breath does get shallow. my practice is not consistent and i do it mostly for 5-10 mins. i still consider myself as a beginner even though i have been researching and practicing at different periods of time (years apart).

what am i doing wrong and what can i do to correct it ?