I'm 31 but my body usually feels about 80. I always feel achy, when I stand up I do the hunched over for a second before stretching to a full stand thing... at 31 years old! I feel pitiful to watch. I live by ice and heat packs and stretching but my physical therapist says I need to get to strengthening in order to progress past my back pain. And I don't know how much of my back pain is "dysfunction" from years of poor posture vs if its fibro pain. But I, too, feel much older than I am. It's so hard to hear my grandfather say repeatedly "at 84 years old, I don't have an ache or pain in my body".... ugh, if only I could feel pain free again!
I wish you luck and hope you have better days soon. Try heat, ice, stretching, get physical therapy if possible, do yoga or tai chi (studies on Tai Chi being done at Tufts in Boston), I'm hearing a lot about Epsom salt baths. When all else fails I do sometimes take flexeril, a muscle relaxer.