Milly hugs to you sweetheart xxx
If it helps, which I hope it does, with both my children each time I had a scan they changed the dates...I hadnt had a m/c at that stage in life so innocently went about my business not worried at all. My dd who is now 5, was changed back 7 days, so very similar to you.
I know you say given your history its good to check and I totally agree, but I would try not to concern yourself too much and look forward to getting to see your little bugalugs an extra time xxx
They even changed my sons edd at 37 weeks to 36weeks, I was so annoyed that time as I was ready to meet the little bean and it meant it was a whole nother week...hehehe
Love to you darling I hope this eases some of your concerns
xxxxxx