Ah sis, I totally get the worry kasi confusing talaga pag ganitong dating ang dating ng dates at ultrasound measurements! Honestly, yung situation mo ay medyo common actually, I have a few mum friends din na may longer cycles before pregnancy, and the ultrasounds kept showing slightly smaller measurements, pero ang babies nila naman ay totally fine pag lumabas. It could be na ang LMP mo talaga is off kasi ng 35-day cycle mo, kaya parang nag-adjust ang ultrasound dating as you progressed (that's normal kasi early ultrasounds are more accurate than later ones). Pero para sa peace of mind mo talaga, ask your OB next visit about the pattern, kung consistent ba talaga ang slight size difference or if it's within normal range, kasi they'll know best your full picture. Either way, you're so close na, rooting for you and baby!