3 and a half months then, sorry I was half a month out!
pre-diagnosis the pancreas is trying as hard as it can to produce insulin with x number of beta cells down, then along comes some extra injected insulin to ease it's burden, and in fact make the pancreas redundant as you're covering all the carbs off with the injected stuff - this gives it time to repair and recuperate a bit - so it eventually gets back working or at least trying to and coughing and spluttering insulin as and when it can, hence the lows and/or not needing injections to cover some meals.
But there is no way of knowing if and when your pancreas is going to play ball, so unfortunately lots of testing and hoping for the time being - you'll soon notice if and when it completely packs in. I think the honeymoon period is probably the hardest time for a T1D, you're probably still reeling from the diagnosis, and think you've got a handle on it and then wham lots of lows and then even the thought of the possibility that the docs got it wrong.........!
It will get easier, just keep testing and go careful.