Retrogrades are really not a big deal in a chart. I have a few too, and haven't noticed anything. Like a friend of mine said - "maybe retrogrades mean that you'd put on your shirt backwards more often?" :-)

One theory is that things influenced by those retrograde planets come much later in life then they "should"... just a theory. E.g. pluto retrograde means you die really really late :-)

I'd look for planets in your sixth house for clues, as well as your south node, and also planets in your 12 house. I should mention here that I have a rather unorthodox way of looking at a chart, and that doesn't mean I am better at astrology because of that - just that I am trying to find a more accurate way to interpret a chart.

Most importantly, there is nothing stronger then free will. That means your chart could be perfect, but your free will and that of others will influence your life. Your chronic fatigue could come from pollution, or Amalgam fillings, or food, or lyme desease or who knows what... none of which need to be in your chart. Have you tried taking vitamin C and B complex? Those are harmless and do affect your energy level considerably! Also, if you do have any Amalgam fillings, I suggest you get informed here on curezone regarding their toxicity - it is no joke. One can even get mercury poisoning from fish... So look at all those "free will" type of possible causes and use astrology more as an experiment.

cheers

ps. Being an early gemini, you may have a tendency towards mental, physical and even emotional lazyness, which in turn would affect your thyroid to work a little slower; try to practice your free will - make sure you know what you WANT in life, and never just let yourself go with the flow! This would be opposite condition of those people who are too stubborn and willful and then suffer from overactive thyroid as a result.