So the calculations by my last period put me at July 20. Ended up in the ER last week with something that has hopefully healed itself, and they did a sonogram. Said baby was measuring 1 day off and new due date was July 21. Went to my gyno this week for a follow up visit and she said they don't change date based on sonogram and put me back to the 20th. I know it's one stupid day... But which one is it??? Lol is it likely to change again????