I refused with my last pregnancy, as I had no symptoms, no history, and basically, I just really didn't think I needed to. Like you, I eat and ate well, though not perfectly, and just didn't think that nasty thing was going to give an accurate representation of how my body'd respond anyway. My midwife was fine with it, though I was a year past the recommended age, because she'd been seeing me for a long time and through enough pregnancies that she could judge that I didn't need to do it.