Low testosterone at young age

I saw my obgyn last December and had my testosterone checked, normal range should be between 8-and around 38 (or 50)i think. Mine was 0. I'm 33 and I've had little to no sex drive for about 5 years. My doctor recommended Testosterone replacement therapy with BioTe pellets. I couldn't start it at the time, but i am desperate to feel like a normal 33 year old, and am still trying to figure out what to do. Early menopause is my concern. I've always been very active in the gym, healthy diet, no drugs, has any one else my age had this issue?