High blood sugar during this period can lead to macrosomic baby that can make the labour difficult. After birth baby is at risk of hypoglucemia, hyperbilirubinemia, thrombocytopenia etc. During this period you need to monitor your sugar levels 3-7 times per day and the insulin doses need to be modified to maintain fasting less than 90 and PP less than 120. Kindly get back with sugar chart and insulin dose details