I used to use Human Chorionic Gonadotropin (HCG) after cycle but realized for me it was pointless in the sense that if I used it during cycle it made post cycle therapy (pct) even easier. Using it right before post cycle therapy (pct) only is more of a battle to get your natty test up and running. You shouldn't have erection issues while using test, which I agree is probably causing it, so it is most likely estrogen. I would start both the Human Chorionic Gonadotropin (HCG) and an Aromatase inhibitor (AI). I would start the Aromatase inhibitor (AI) for a couple days then Human Chorionic Gonadotropin (HCG) 250 x 2 a week. If you are not taking anything else, I will bet your estro is to high so try to get that under control, and for now I would order some Tadalifil (cialis) from a research company just to get you through. If you really look around, you can find it very cheap.