What’s a normal weight gain by 34 weeks?

I’m curious what others have gained by now. I started out this pregnancy at 118, and was recommended between 25-35lbs of weight gain. I got diagnosed with gestational diabetes around 27 weeks and have been trying to control my numbers with just diet. At 34 weeks I’ve only gained 16lbs… my last two pregancies I gained most of my weight during this time and it slowed by the last for weeks, I gained a total of 30-35lbs with both of those. Should I be worried about the lack of weight gain? She’s measuring correctly but both of my other babies measured ahead, and I didn’t have GD with them. My doctors have ignored so many of my concerns I feel like they are so concerned with me not gaining weight because of the GD that they don’t even think about me not gaining enough. I’m also worried because I have been so exhausted this week, I have two kids and I feel like this last night I can barley function and I’m hoping it’s not my diet that might be adding to it, I consume lots of protein but carbs have been hard because they spike the blood sugar.