Skin tag or cancer?

Marlee • Married💕 5 year old son💙 21 month old daughter🌈 🤰 with #3🌈

I’m starting to freak myself out about this. Have had this for about a year thinking it was just a skin tag and would eventually leave but it’s still not gone. It’s right on the bottom of my nipple. I tried some skin tag medicine for awhile as well with no luck. Has anyone had this before and should I be worried it’s like cancer or something! Lol please help!!