Hi Jennifer - I have three suggestions. Since you didn’t mention whether you have reassessed your insulin dosing - I would say that sometimes in pregnancy, you have to change your basals, carb ratios and/or insulin sensitivity every few days! Around 8 weeks you may expect, generally, to need less insulin across the board through about 16-20 weeks. But everyone is different - if you find yourself going high after meals rather than low, perhaps you will need more insulin for now.
Another suggestion I have is to be sure you are dosing properly for fat/protein since you are low carb. What can compound this issue during pregnancy is that your digestion is slowed to ensure your body gets as many nutrients as it can to baby! So if you are going high well after a meal… perhaps you just need to be doing something like an extended bolus that is more generous to cover that fat and protein.
I would also say that, when you have such a tight BG target, it is tempting to overcorrect all the time. This can also cause a roller coaster effect when you are constantly over dosing for a high BG and then over eating to treat a low. Try to be gentler with your corrections if you believe you are experiencing this.
I wasn’t low carb in pregnancy, but I know many mamas have successful, healthy pregnancies while doing so.
Sending good vibes!