There's something to be said for single shot amps

.
I might be being "captain obvious" here - but... go looking for an injection site? Evidence of needle prick, poke around and feel for a lump or sore spot, perhaps?
I'd guess that missing a dose wouldn't be as bad as double dosing. At least it won't convert to E.
Anyway - going a week without T isn't going to make you go "backwards" in the long run.
I suppose taking a half-dose mid-week might be a decent compromise. If you have injected, then your T levels would have dropped off a bit and the 1/2 dose might just put you at your "peak" T level for an entire week (as opposed to totally overshooting it with a full double dose). If you haven't injected, then you'd be back on track (and only missed 1/2 a weeks T).
Of course, I am in no way a doctor, endo, or anything else. I am completely and utterly talking out my rear end. I have absolutely NO medical knowledge. A medical professional is more who you'd be needing to speak to.