It would be in your benefit if your doctor would give your shots to you at least 1x per week, or better yet if he would send you home with your own script so that you don't have to pay for his office visits every time you need a shot.
Not sure why you're throwing the thought of PCT into the mix. If you're going on TRT then that's because your natural levels are low and probably will always be low. If there's hope of restoring your natural levels then you should be trying to run a PCT now. If you are committing to TRT then understand that it is for the long-haul.
What's your age & other stats if you don't mind me asking? Any suspicions as to why your "T" is low?