Blood sugars dropping

So for the past few weeks I’ve really had to watch my intake to maintain my blood sugars. I’ve been diet controlled since 28 weeks and am currently 35 weeks. My sugars were starting to increase and I had to drop my carb count slightly to stay diet controlled. Well now the past few days my sugars have been on the lower side. My fasting this morning was in the 80’s! That never happens! Could this mean my placenta is not working properly?!!! Totally freaking out..