I am 22 years old and just recently came off of a testosterone propionate cycle. i used hcg and arimidex (anastrozole) as a pct but now i can't get an errection?

You may not: Unless you are truely hypogonadal you are harming yourself. Too high a dose of testosterone can shrink your testicles and make you impotent and sterile. See a real doctor now to determine if by your prior actions you have done yourself damage and whether it can be repaired.

Go see your doctor: You probably have too much Estradiol still & not enough testosterone. My concern is that you're cycling your hormones and not being monitored which is a very risky thing to do. Folks who really need extra t don't cycle their regimen. They just stick w/it. As dr. Geffner noted, you're risking your future fertility & testicular function.