Ok first off, your doc is a moron for having you inject 2 ml every 2 weeks. That will lead to extremely unstable blood levels, shoving 400mg in your system at once, once every two weeks, not to mention cause a sharp spike in estrogen.
I would advise you split that 1 2ml shot into 4 0.5ml shots instead. 2 0.5ml shots per week, one on Monday, and one on Thursday.
Secondly, no RED-PCT cannot replace your TRT, however, you can use it as an aromatase inhibitor to keep your estrogen under control while on your TRT. Are you currently prescribed arimidex or aromasin or anything to control estrogen aromatization? Hopefully your doctor didn't mess that up too.