I have never used steroids myself, but I have hung around enough bodybuilding and fitness websites to know that most users also take some kind of pills to stop excess estrogen (breast growth, testicular atrophy etc) whilst on the gear.
To be honest if you are going to continue to use you really should research the subject in detail - Because using steroids at non-therapeutic levels is potentially dangerous............ They can effect your cardiovascular system, liver, fertility etc etc
2k sounds pretty cheap, but I can't find anything out about the doctor you mention either,