I saw something at my GF's place I shouldn't have

UPDATE) I saw something at my girlfriend's house that I wasn't supposed to see.

Hey everyone.

I've never posted on here before so I'm not really sure how to start this lol. My mental state is genuinely falling apart and I'm freaking out about what to do, so someone told me this place has the best takes and I figured I'd just write it all out. Sorry if this is all over the place.

So I'm 28, and I've been dating my girlfriend for about 6 months now. I went to an all-boys high school and engineering school so I literally had ZERO dating experience. I'd never even been on a blind date before, but my friend kept pushing me to meet someone, so I finally went on one. And honestly? She was just so pure and kind and had such good manners that I literally fell for her on the spot. I asked her out right there.

Then last weekend I went to her place for the first time. And I think I saw something I really shouldn't have.

(I'd never been to her place before, but we were dating nearby and it started raining so we had no choice but to go inside)