12 week scan changed due date to an impossible date - worried about impact on C-section timing

[duedateworry]

I tracked my cycle with LH strips, which pinpointed the LH peak / day of ovulation. Once pregnant, I had my HCG tested at 11, 13 and 15dpo. The results were exactly in line with what they should have been on those days.

At my 12 week scan, the due date was changed to be four days earlier.

This would mean I ovulated on CD8(!), and days before getting an LH peak. It also means that the HCG results (which they’re now saying were taken on days 15, 17 and 19 dpo), would have been completely out of sync with what they should have been.

I know the date they’ve given me is wrong and I’m worried that the c-section I need to have will be set for a date four days too soon.

Has anyone had any joy in getting the NHS to change a due date that is patently wrong?

I don't know what half the stuff in your first post means to be honest, but having had 2 c-sections, I really wouldn't worry about 4 days. It won't make any difference, you are overthinking it.

Wishing you a happy, healthy rest of pregnancy. 💪