My testicles shrink at the begining of my cycle, but the last 2 cycles they start coming back mid cycle for no apparent reason. I'm not using HCG, or Clomid, and I'm not dropping any gear. In fact I always ramp up my doseages as my cycle progresses.
Give yourself a week(ish) at 500 iu ED. You can cruise then to the end of your cycle with a couple of shots per week, maybe only at 250iu per shot if you're lucky. Take a search, I'm sure you'll find other protocols.
Alternatively, ignore them and run 10 days of 500iu per day or 1000iu EOD to finish maybe four or five days before you begin your actual PCT.
If you're not running an AI, make sure you're running one if you take up the HCG.