low dose??? so a trt dosage?? 100-200 week?? that's a cruise.. but running back to back without pct you are asking for diminished returns on the effort..
My advice in your situation is to do a pct.. if you are not into that and determined to continue then use the least amount that will allow you to continue to grow, when that stops you need to stop do a good pct, and take some time off, learn more about diet and practice that.. then come back and do a cycle that has enough product and in long enough duration to effect change..
good luck