I’m so confused please help. And please be kind.

So I’ve never had sex, I’m WELL past puberty (mid 20s), and have only been fingered by my bf once well over a month ago (aug 4). I had been super stressed from work and anxiety that it changed the heaviness of my last period two weeks ago (lighter but still 4 days, not implantation). I had been experiencing pretty bad cramps during my ovulation period and now I’ve noticed my inner labia have gotten a little larger and a little more darker. I took two pregnancy tests just to be sure and they both came out negative. Did I test too early? Could I be pregnant? Or what’s a possible reason for the change? I went to the gyno and she told me there were no initial signs of infections so idk what’s going on...