If your doctor has prescribed injectable testosterone then your serum
test was probably tanked. That said, you will probably be on
test the rest of your life. I'd suggest you spend as many hours a day as possible studying HRT. (hormone replacement therapy) If your doctor doesn't know or understand HCG,(basic for HRT) find another one as quick as possible. Doing
test alone can possibly screw up your hormonal system for life. There are a very few who can suffice on
test alone but that's not common.
Read the forums, go to Amazon, google, Ect and search
TRT, Hrt, testosterone theropy, ect.