Labia have gotten bigger?

Ok so my inner labia seem to have gotten bigger since starting to have sex. They've always stuck out a bit farther than my outer labia but never really this much. They've also darkened a little bit. My boyfriends even noticed it. They're starting to cause irritation during sex if I'm not extremely wet. Sometimes it's really hard to even get his penis in because of them. And sometimes they get kind of "caught" I guess during sex and it hurts. Is it even normal for your labia to grow??? Because everything I've read has said they don't, even having a baby doesn't change them so what gives with mine?? I'm 20 btw