I don't know what a "test. powder" is. I know whatis, but I've never heard of "test. powders". I don't know what Syntheroid is either. Regardless, if these products are testosterone boosters, then your use of them did not and is not negatively affecting your body's hormonal output. Any changes in well-being or behavior that followed cessation of use are likely all in your head and brought on by misconceptions about hormonal optimizers and dietary supplements in general, similar to the guy who says he had to stop using creatine because he "couldn't deal with the feelings of rage". Your hormone levels, while on the low end, are far from being abnormal.