What is wrong with my vagina??

Sorry this is TMI- I’m going to the gyno tomorrow.

My vagina is really itchy. It feels like a yeast infection, but I have no discharge at all.

It started Sunday. It was the last day of my period, and I had been using ultra tampons, which are huge, like the size of a flashlight. My periods are super heavy, but on Sunday it was tapering off so I probably should have used a regular, or a light tampon, but I didn’t.

Anyway, Sunday my vagina just felt irritated. I assumed from the tampon since it was really big and my period was light at the time. But then yesterday, I felt itchy. So now I don’t even know what is going on.

Anyway, I’m going to the doctor tomorrow. The did have an opening for me today but i didn’t have time to go bc I have to pick my son up from school so I have to wait. In the meantime, does anyone know what this could be?