is this possible ??

i had sex the day before my period started, broken condom so possibly when he came some got in me.. my periods are super short (3-4 days) and this one was the same. but now after my period is over i have slight cramps, acne (which i never get unless its the week before or the week im on my period), and a headache. could i have gotten pregnant during my period or am i just being dramatic?