Confused advice pls !

I’ve been having redness and pain on my vagina lips suddenly for months Started after my last period and still continuing through my next one it’s dry feeling but I’ve noticed a painful bump that seems to be the problem on the outside of the lip but got tested for everything 3 months after I was last sexually active and everything was negative gyno said everything was normal inside not to worry but it’s uncomfortable and ideas what it could be it started out as a tug feeling up in my vagina ??