Thick black hair growing out of your nipple?

Y’all.... I’m concerned. Today when I took my bra off after work I saw something on my right nipple so I looked at it closer and it was literally a black hair growing OUT of my nipple. I pulled it out with tweezers... But, wtf is this? I looked it up and apparently it can happen to pregnant women because of hormonal changes. Am I pregnant? Has anyone else experienced this?