Well, I vary from the 70's to the 250's for the most part, depending on the time of day and what I eat. I'm eating reduced-carb (NOT low-carb), and it has helped some, but since Christmas, I haven't been able to get under 140 for very long. And I've been taking more insulin than usual.
Diabetes is a life-long job, and you can't afford to burn out. I had a major depression the first part of this year, and it led to me not taking good care of myself, which led to a diabetic coma. Believe me, you DON'T want to go there! I almost died.
Even when it's hard, we just have to keep putting one foot in front of the other, and slog on. If the numbers are less than perfect, either on the high side, or on the low side, you just have to treat it and go on from there. If there's a pattern (I don't usually have patterns because my life is so irregular), maybe something needs a little tweak. If you have a good doc or CDE, that can help a lot (and a bad doc can send you to the hospital, like mine did -- he's fired!)
Just hang in there, OK??