I quite frequently experience "false awakenings" and "lucid dreams". Your experience sounds more like the former, but a bit different. Also, in car accidents & on the ski hill I have also had moments where everthing seams to slow right down, giving me all the time I need to react. There is a term for this, but I cant recall it right now. Our brains can sometimes interpret things at different speeds. Unless this is a regular occurance, I wouldnt worry about it too much; and I also don't think a general practitioner would be much help, but perhaps they could refer you.

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If you feel you have a question, dont be lazy; make sure you have asked yourself first. Then search the forum, then just fucking google it to get as much detail as you can. You may then seek clarification on specific points from others.