I hope things get better with this poking ordeal... It was daunting to me, and I'm 28! So, know I'm thinking of you.
I ranged between 85-95 fasting and 150-250 2 hours after most meals (if I don't take insulin). When I take insulin, its more like 110-120 after meals. I've been told the magic number after meals with or without insulin is within 20 points of what it was pre-meal. They are trying to get your body back to what it was pre-meal to know if you're processing the carbs correctly. For example, if my pre-meal is 100 and my post meal is 140, it is still a bit high cause it should be more around 120 at the highest. Make sense? This is what I was told in the study for CFRD I recently completed for CFF. I've also been told this by a couple of CF docs.
However, if your fasting is already high pre-meal, you deffinately need to look at insulin, cause just getting it down to another higher than normal number post-meal is not necessarily a good thing if you were too high to begin with.
I know its all overwhelming... I feel overwhelmed by it still. Just know you're not alone.