A question for you all

So, my doctors have been concerned that in the last month I'm not measuring as big as I should be, like pubis to fundus today was 34 weeks and I'm 37 weeks. Has anyone else ever had that? They told me today I shouldn't me concerned as long as the baby keeps growing, but that is not much comfort. One doc even ordered an ultrasound to measure the baby. According to that I was two weeks ahead AND the baby measured at 6 1/2 lbs! But then in the office they tell me the baby is small and I'm measuring way behind. It's very confusing.

Anyway, if you've ever experienced this, please chime in and let me know how things turned out for you. I know the whole thing is a guessing game anyway, but a mama can't help but be concerned.

Thanks!!