Your low hair indicates that you have always been a low T guy. So your relative T drop is not as high as for a hairy guys.
In terms of facial bone structure, facial and body hair, height... how are you different from father or brothers? And history of acne.
Any concussions with football? Blows to the head can damage the pituitary. However, from above, T was never high. Similar concerns for auto accidents etc.
Your serum glucose is low. That can lead to a lack of energy or not feeling well. Did you fast and train before lab work?
How does your body and mind react to major stress?
If you test LH and FSH and they are high, then your testes are the problem, if low, the hypothalamus and pituitary are at the root of things.
Read the posts of others and see how things progress.
Read the above and follow links in the article too.
Do you have health insurance?
No cholesterol data?
Any EFA's in your diet? http://en.wikipedia.org/wiki/Essential_fatty_acid
What took you to the doctor in the first place?
Digestion problems can lead to some vitamin deficiencies. You do not take any vitamins at all.
Where are you located? How much does your skin get exposed to sunlight? Do you feel run down in the last of the winter season?
Depression? Panic attacks?
Please to no miss questions: Have your testes changed, hang differently, ache now, ached ever during a fever?
When digestion improved: Did you take antibiotics before that? Every used probiotics?
Where do you carry fat and how has this changed? Changed over last 6 months?