Confused? Nipples hurt whenever they get any pressure put on them!

Hey, so, I'm not breastfeeding or anything, have never been pregnant and don't want to be (and hope this isn't a sign that I am because I'm not on speaking terms with the guy who would be the father and really I'm not at a place in my life where being pregnant is at all an option) but the last maybe five days so far, whenever my nipples get poked when I'm showering or anything or whenever they get squeezed they hurt like hell, and it's just the nipple. I originally thought it was because I had gotten a new bralette but I was too lazy to wash it before j wore it but if that's the case then I should be fine by now but my nipples still hurt whenever there's any pressure on them... What do i do? This is really starting to freak me out...