Hey, Durden:
I started taking T almost six months ago, so I'm only a little further along than you. I don't know what dose you take, and maybe that makes a difference. I started on 1/2 cc and last month it was increased to 1 cc. My arm muscles didn't ache, but I did get cramps in my legs at the beginning (not anymore). Also, I don't remember being fatigued, but the appetite changed so that I became hungry every couple of hours and could only eat small (but more frequent) meals, instead of large meals. Feel free to read my thread ("Captain's Log") in the Transexual section, if you want to know more.