Thx Bill, Petchski and Dr Beehner for your encouraging words.
Tension was brought up by my doctor, although he said cases like mine were all that common, especially since it was only a 12mm-wide strip, he said the shedded hair would grow back. I feel better now now that all your views are in line with his. (I freaked out at 1st mainly because all donor-shock-loss pictures I've seen show nothing like mine, with all the hair wiped out similar to patchy hair loss.)
Anyhow, like Bill said, I'll try not to sweat it and hang tough. Thank you all again. I'll post my progress here.