Hello,
You need to keep increasing your insulin until your levels are good. This is very important. Work closely with your doctor. Insulin requirements increase dramatically through pregnancy.
Also you need to treat carbs like poison (almost). Cut out all the bread and pasta and rice. You can still eat veges (particularly the non-starchy ones). You can eat dairy, but nothing with added sugar. Only small serves of fruit.
I am pregnant and diabetic (I take insulin as well) and have found that eating low carb is a great help in controlling blood sugar.
My daughter got T2 in her 6th month. She has one month remaining. Were you T2 before your became pregnant? My daughter has made an amazing impact on her glucose levels, by doing what I do: Treat carbs like they're a poison to your body. I don't calculate glycemic loads, or consider good carbs and bad carbs. Rather, I avoid them entirely if at all possible. Now... I live on handfuls of almonds, peanuts, walnuts, and cashews. Cheese!. All of those things have latent carbs, it can't be helped. But I won't kowingly sit down and consume a plate of pasta, rice, or potatoes; I just won't do it. No cookies, donuts, or candy. This ideology has worked for me, and now works for my daughter. I set out not to go on a diet, but to establish a new lifestyle of eating, and I've found that if I stay away from foods rich in carbs, regardless of their "quality", I don't find myself sliding down the slippery slope. Perhaps this may work for you as well.