As a type 1 diabetic, a lot of your treatment is actually in your own hands. YOU are the one who lives with your diabetes, so technically you are more qualified to make small, daily adjustments in your insulin regimen than your doctor.
For example, since my doctor's appointment on Friday I've been pushing lows. Actually, it technically started last week, and I dropped my Lantus dose a bit then. Now I've had to drop it again.
My point is, as a type 1 diabetic you have to be able to recognize when your insulin regimen needs to be changed. You are the one checking your blood sugar every day, so you are the one who is most likely to notice trends in the numbers. And if you are constantly crashing or constantly going high, you are the one who will need to make a decision about your insulin doses. You can't wait until the next time you see the doctor, particularly if you are dealing with a lot of lows.
I'm happy to say that so far, my adjusted Lantus dose seems to be doing the trick. I didn't have any major lows or major highs today. It remains to be seen whether I'll be staying on this dose long-term or not — it's 2 units lower than what I take 99 percent of the time, and drops like this one are usually pretty temporary. But when my insulin needs go up again, I'll be watching for the signs!