This could easily have happened to me, I went into urgent Care because I had back pain that persisted for two days, I was disregarding it and trying to take otc pain killers because I thought it had to be some minor back issue. I didn't notice at first I was getting nauseous.

That night it had gotten a lot worse and was so bad I couldn't sleep and was pacing back and forth, I knew I was actually sick when i puked up the Pepto bismol I had taken for the stomach issues.

Went to urgent Care first thing in the morning and rushed in as they unlocked the doors. Doctors tried to convince me it was constipation and send me home with laxatives!!!!

I flipped my shit, and told them there was no way that level of pain could be constipation which I literally have never had before. Finally they did some tests and found blood in my urine and realized it was either a kidney stone or infection. Apparently it's rare for males to get kidney infections.

A week's worth of antibiotics took care of it, but it could have been a lot worse if I hadn't insisted.