Who would knock after not receiving contact on the phone? If something happened, who knows what is going on in the house. Perhaps she fell asleep (common with the hours these girls have to work and other unmentionable reasons) but what if family or a jealous boyfriend is there.
You are potentially setting yourself up for a very uncomfortable and or dangerous situation. Not very cool. And if she did fall asleep, not may providers I know would jump out of bed and welcome you without a shower, makeup, etc. unless you have seen them several times and have somewhat of a relationship.
Or even worse, her session before you ran over with Gallantnight. He is pissed because he had to open another envelope. You are pounding on the door and he is confused thinking you are a pimp going to rob him and he is packing.
The OP needs to retake hobby 101.