Can I have a little happy with my worry?

Today the Dr did a scan and baby was 7mm. That means he only grew 5mm in 7 days.. that really concerns me... the dr said sometimes they have sudden spurts and then days with not much.. so I shouldn't be worried.. but I AM! and the Heart rate looked great. The dr doesnt like doing a measurement as its not healthy for the baby he said.. but he said he can tell it was very rapid and way up there.. thats the part I like! There was a dr that saw me last Wed (just 5 days ago) and I think, and my Dr thinks, he measured the baby too big. It looked like he got part of the sac in the measurement.. anyway it made me really worry cuz the measurement he got was 6mm and how did the baby only grow 1mm since last Wed?? yeh doesnt make sense.. especially cuz his heartrate is much better today than on Wed.. so I dunno .. what I do know is this- 1)my baby has a great heartbeat 2)my dr isnt worried about the baby measuring a few days behind 3) I am extremely uncomfortable/food aversion city/naucous sooo with all this worry and uncomfortable symptoms, this baby BETTER make it! Its a command and I wont take no for an answer:)  Heres a beautiful new picture: let the countdown till the next US begin... 6 more days of worry! ughhhhh