I am 21 and suffer from severe performance anxiety. I'm fit and eat healthy but I am terribly nervous with it comes to the bedroom. My doctor was happy to prescribe me with a 50mg dose of sildenafil

Couldn't hold an erection after taking a 50mg tablet of sildenafil. Yes I was aroused and I did get erect but it died down very quickly after 1-2minutes. By the time I had the condom on my erection was gone.

Took the tablet roughly an hour before attempting to have sex.

If I try again but this time take 2 50mg sildenafil will that be okay?