I felt a little strange--maybe placebo--from about 6-36 hours after the shot; from 36 hours on to a week or so, I felt miserable, and then after that I felt OK from the 1-3 week range (likely when my levels fell back in to normal ranges). It's definitely quite clear that there's no way to use huge doses and stay in the normal ranges that we're looking for.
I definitely sympathize. I'm just now starting to see an endo who seems to know what he's doing, and he's having me do another round of tests--in the meantime, I'm just sitting my hands. Between the mood and concentration effects of the low T and the distraction from worrying about the tests and treatment, I'm practically useless!