How much test were you taking a week? That makes alot of difference to wether it is test flu or maybe your body was rejecting the oil base used in the test. It could also be from the ba or bc additives that keep the product steril. Personally I have had the test flu before, but it was because I was taking 1000mg per week and was a shock to my body. Try to increase your water intake and cut back on the dose, depending on how high it is.