I missed once, on my second injection, I got zero not even a chubby. That resulted in a three day silent treatment.
Thankfully I havent missed since and it starts working in 5-15 minutes.
Last night it took over 30 minutes for the injection to start working.
At 20 minute mark, I told my wife, "I dont think its working".

I dont have Sudafed, And was worried that if I inject again I could possibly get in big trouble. At 25 minutes (after injecting) I said again its not working.

She was disappointed. And said the mood was lost. At this point it was 1/2 hour since I got up to inject.
At 30 minute mark, it seemed to start working but I wasnt quite sure. At 35 minute mark I was 80% erect.
By this time she was clearly not interested, i tried to get her to feel for herself but she withdrew her hand.
10-15 minutes later I reached out again with light touches. To which she did respond

The injection took over 30 minutes to start working and I was erect for over two hours. Any ideas on why such a delay?