Which ultrasound should I go off

Shakeria

So my 1st ultrasound at the hospital( I’m high risk for ectopics) gave me a due date of May 3rd , the 2nd ultrasound which was yesterday we actually saw baby and hr of 159 but it measured me for May 5th , I know it’s only a two day difference but the 3rd is also my birthday so do I keep it at my birthday or adjust my app to the 5th for babies accuracy?