I had my numbers in PERFECT range for about 5 months prior to getting pregnant. That seems to have all went out the window now that I'm actually pregnant. I am having a lot of highs, but am hesitant to up my basal rate because I'm afraid the 1st trimester lows will kick in. So right now I'm just checking my blood A LOT. Like 8 times a day. If I'm high I take a correction dose. Even if I'm just a wee bit high like 150 I will take like .5 of a unit just to bring me back down to my range (80-130).
Before I had my numbers under control my A1C was 9.7! Yeah I know that's AWFUL! That's when I was on shots though. Once I got on the pump within just a few days my numbers started to stay in a great range and within no time my A1C had come down to a healthy range. I don't know how your insulin regimen works right now, but for me a pump really did help. If you are planning a pregnancy, it is definitely worth your while to look into getting a pump. If you prefer shots though, just monitor your numbers A LOT. And when you are high, always take a correction dose. I guess that's why my A1C was so high while I was on shots. I took Lantus twice a day (even though it's a once a day shot it always wore off early for me so my doctor told me to split the dose) and then I bolused for 3 meals a day. But if I checked after a meal and I was like 190 I wouldn't take a correction dose. It was just one more shot that I hated. But of course that was so unhealthy and stupid! So really if you want to get your A1C down quick, you are going to have to monitor your numbers a lot and always take a correction dose if needed. I also try to fit in at least 30 minutes cardio a day, I drink LOTS of water, and try to eat pretty healthy. Goodluck!!!