laundry detergent & down there.

erin
has anyone else ever had your laundry detergent interfere with your downstairs areas smell? lately if i wear pants or underwear that were washed with the detergent i've been using, i STINKKKK like bad! but if i wear underwear that was washed with a previous detergent, i'm like a damn flower. 
has this happened to anyone else or am i crazy? 😂 
*side note, i was using cheap laundry detergent LOL and i do plan on switching back and re-washing everything.