newbs are obsessed with schedules and timing .. i was the same way.. i remember my first couple cycles i marked everything on the calendar and went by the book.
once you gain experience you won't be so obsessed with these things. if you are using E just inject twice a week and spread it out 3-4 days. if you go 5 days without an injection who cares. its not gonna make a difference.. once the stuff is built up in the body then it will naturally fluctuate your levels on its own.