parasites exhaust your immune system which in turn exhausts your glands - adrenals and thyroid in the first place. Hence I would be surprised if your chormonal tests were OK, rather then out of wack.
To help your glands, take some atomidine. Start with one drop in the AM, and another drop late in the PM. Both times on empty stomach and don't eat anything for at least half an hour afterwards. The next day increase to two drops twice a day, then the next day to three drops, and so on until 5-6 drops twice a day, and then go backwards all the way to 1 drop twice a day. After that take about one drop a few times per week, also on emtpy stomach. This will help maintain your glands and will boost your immune system. You'll also feel much better in general.