Sore vagina after riding a bike?

I know the title is funny, but girls I rode a bike yesterday for 1+ hours in total after many many years of not doing that, and my vagina started feeling kinda uncomfortable after a few hours when I came back home.

It doesn’t itch, nor has any weird discharge and smell. When I open it is reddish and kinda burns. Could it be from riding the bike? My whole butt area hurts generally, as the seat was kinda hard and I was not used to it. I also wore a tight jean and a lacy underwear.

I have a history of UTIs and yeast infections but they only happen after sexual intercourse. Plus, I did a culture a few weeks ago and everything was clear!

I don’t know what to think! 🤷🏻‍♀️