I am a 37 yr old female, yesterday I discovered a knot that now has gotten bigger in my vagina but internally. It is swelling my labia and is uncomfortable, like pressure build up if I wipe there or use a tampon. I had just started my period night before last which is the same night I noticed the knot. It doesnt hurt, just uncomfortable. I have never heard of anyone having this issue and freaking out a bit. Can someone please tell me what this could be? I dont have insurance or a lot of money so kinda need to know how serious it could or could not be...