Pain 2 out of 10 and you go to the doctor?

My thoughts - give it time, you most likely just had a minor tweek in your back from losing proper form or something similar. If it wasn't a sudden injury, I would think it will pass with some time. You tend to work things harder on cycle and that would be my first guess. Honestly, I hate going to the doctor and if I can live with the pain I most likely do. 2 out of 10 is my everyday aches and pains of being 42.