Inside of vagina

Okay I know that everybody has different vaginas but I noticed something recently that’s really been worrying me out. A couple inches deep into my vagina is this squishy pouch thing. I have never noticed it before and it is really scaring me. Is it possible that It could be something serious like cancer? Or is this just a normal part of a vagina that I’m just noticing now? It isn’t painful but I never really have felt it before.