Join the club with the numerous doctors

Some will sit there and say there's nothing wrong with you, like the one I had a couple of weeks ago. Unfortunately most doctors work by testing, and when nothing shows up on blood tests they're clueless. I don't envy them, they have a budget to stick to (here in the UK they do anyway), and there may be a lot more people who have seemingly more serious conditions that a few blood tests can diagnose. It's still very frustrating. My father has seen specialist after specialist for the last 20 years, spent weeks in different hospitals, and still they have no idea what's wrong with him...
Something to consider with the lab result is that errors do occur in the labs. I know, I work in one

It could be that something had happened to the sample before it got tested, or maybe the equipment wasn't calibrated properly or the BMS was having an off day - it shouldn't but it does happen. To be honest if you felt no different, and were still conscious at that point, chances are the 58 was more accurate. Still that's quite low.
DHEA seems to be more of a concern if it's high, though I'd think almost 0 would be a concern too...I can check that out.
Keep persisting with the doctors, but in the mean time keep working on getting better yourself. I would look into an elimination diet, or at least eliminate any suspect foods and go from there. Assuming this is diet related, you'll have to go through food elimination to find what you can and can't eat, regardless of whether you're diagnosed. Common food groups to eliminate would be sugar (glucose, fructose (fruit sugar), galactose, sucrose (table sugar), lactose (milk sugar)), wheat, cereals too if you think they may cause problems. The diet will take a lot of planning and preparation.
How many calories are you consuming roughly?