Does anyone else start having sexual problems whilst staying on for a long time?

My sex drive is high, I can get erections and wank but when it comes to the actual action with a girl I struggle to get an erection or have trouble maintaining it.

Currently on 600mg test 500mg deca, using arimidex to control estrogen and dostinex for prolactin and my estrogen levels are fine. Will using HCG 500ui X2 week fix this as someone has said it's due to natural supression. Or shall I start using calias until I pct and come off?