Type II Diabetes

How do you moms manage to keep your sugar low during the last trimester? I’ve tried everything before anyone ask. That includes diet change, lower carbs, moderate work outs....nothing is helping at this point. We keep increasing my insulin units but I don’t feel like that’s effective anymore. At this point I’m so frustrated that rather have this baby around 32-33 weeks and she do a NICU stay vs my sugar increasing and giving birth to a stillborn. I worked to bring my a1c down from 12.6 to 7.4 and I just feel like it’s all for nothing now.