hemorrhoids?

first time mom here. I’ve never had hemorrhoids before so not sure how they feel, etc. I noticed a bump of the inner part of my butt cheek (sorry tmi) but when I wipe or sit a certain way it is uncomfortable and hurts some. The pain isn’t terrible though. Just pretty uncomfortable. How do i know if it’s a hemorrhoid or something else? It popped up out of no where and I don’t have any experience with them. Thanks in advance