How realistic/healthy is my body?

I think you sound perfectly reasonable. However, it is never too late to lose weight. All that matters is that you are happy with yourself, especially on the inside! I am 5'4" as well. In high school I had a 28" waist and was very fit and active due to sports. Now that I am 26 and working long hours I am not active at all. I now have a 27" waist but I look larger due to the lack of muscle. I would much rather weigh more and be toned than weigh less and be all fat. I think you are at a perfect size, but it really only matters what you think.