What I do right after injecting trimix

Hello All

I understand one has to massage penis all over right after injecting in order to spread the medicine. Any other tips What to do?

How long to massage for? Should I walk, sit or lie back?

Also is it possible that trimix Won’t work if I am about to have sex right after injecting and my brain knows that sex will Happen soon? Or trimix doesn’t care what the brain or mind thinks?

Please advise. I had success in trail at the clinic where 8mm needle was used. Later I home I tried twice and failed. Found out that I wasn’t poking the needle deep enough and the home needle was only 6mm rather than clinics 8mm needle.