Vagina problems

For the first time ever I saw a bump on my vagina. Eventually it turned into a white head and went away, but I’ve never had one before. Everyone keeps saying it’s the change in my soap, but I didn’t know soap could effect it like that. It completely freaked me out, and now I don’t even know what soap to buy. Has anyone else had a bad reaction to a soap because this was my first experience and I don’t know how to feel.