Sorry for your losses. I understand why you're worried now.
I don't think there's any way to know for sure what's happening, and I don't think you should put too much stock in your sugars. My sugars were low a lot early in pregnancy, and each pregnancy is different.
I don't know if HCG would affect your results - could you ask?
Sorry that's not much help, but Ive been worrying throughout my pregnancy about various things, so I know what it's like to have that fear that something's gone wrong. All I can say is keep positive and keep calm and relaxed. Stress isnt good in pregnancy, so if you keep calm then you'll know you're doing something important. Eat well, rest and watch your sugars too.
Good luck. I hope this pregnancy works out for,you. Just take one day at a time.