Hi Mellymac!

You might be best to do the 4th Sept and ask your Dr for an early ultra sound.

I was 3rd Sept, so my EDD is 10th June. But this changes anyway when you have your 13 and 18 week ultra sounds when the baby is formed and they can measure.

So for now, being so early, I wouldn't stress about it and just take it from your last cycle date, explain your long cycles to your Dr and see what he/she sugguests??