Interesting, and good technique. Maybe the significant thing is that critical highlight detail around the eye has been lost. Recrisp's edit suggests the loss is unrecoverable. Just try to watch for bright highlights when shooting, and tone down the exposure if you can. Watch for blinkies! The old rule about the shutter speed doesn't apply if you were on a tripod. It also doesn't apply if you are hand-holding with IS on. And it is a very rough rule anyway, basically being a numerical coincidence. I set my shutter speed based on what has worked reasonably well for me before. As far as ISO is concerned, try it. It doesn't cost anything except for time. Most would not consider 1000 to be very high. There is noise reduction capability in post-processing that can help a lot.
Thanks for these further tips Archibald - I have much to learn from you folks! Thank you!