When I was doing my GCSEs, I had a lot of health problems which prevented me from doing well. For this reason, I probably should have done resits for a fair few exams. I was disappointed with my results, but at the end of the day, that's just life. I can't blame something I couldn't control on my GCSEs, because it was me taking them. I did deserve better grades for the amount of work I put in, but in the end, I was so ill that I ended up passing out in some of my exams.
Did I retake them? No. Why? Because I knew I'd achieved the best grades I could given the circumstances, and as long as I know I've done my best, I'll be happy with the result.