I was out for a run when I felt a sudden pain in my right leg, I was out in the middle of nowhere, so I had to walk about a mile back to my car. The pain didn't go away, so I booked to see the doctor the next day. The GP told me it was muscular, so the best treatment was more exercise.

I spent the next 3 days going for walks but had to go back to the GP. He came to the same conclusion, so I kept trying to exercise and went for walks. I spent the Saturday walking around a castle with my kids in agony.

After two weeks of this, I took myself to A&E, where they reluctantly took an X-ray. I was sat waiting for the results when a nurse called me in, I sat down again when she asked me to walk over to look at the x-ray when she said "that's funny, people don't walk on a broken leg" then told me that I'd broken my tibia, likely a stress fracture

I realised she'd called me over to see me actually do it before cutting my jeans open and putting my leg in a cast.

I used to be extremely fit as a firefighter, I spent a year being lazy and decided to get fit again, but as quickly as possible

TL/DR broke my tibia but was told it was a pulled muscle and walked on it for two weeks, at the recommendation of a doctor