I would almost bet that you have ingrown hairs from shaving and riding.
When I get an ingrown hair down below, it turns into this nasty bump and a zit. It's really gross looking.
I have had to stop shaving in between my legs... if that makes any sense. Sure, it's not *sexy*... but I couldn't deal with the backlash of irritation when I rode.
One night the irritation was so bad, I couldn't wear panties to bed.
Let us know what the Doc says though.
OH! And you put the body glide on your skin. I always put some on between my legs... up near the private parts... before I ride... even if it's only going to be 20 miles.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"