Nipple question? HELP, please!

I’ve always had these slits on my nipples, I don’t think they’re that normal as my girl friends don’t have this? I’m pregnant right now so they’re a little more puffier and dark brown lol but do you think breast feeding will be a problem?

Are these a type of inverted nipples? The nipple itself is not pressed into my areola it sticks out like a regular nipple. I’m just wondering about that slit.

Thank you in advanced for answering!