Due date help

Sa

I’m confused on when my due date is. The first day of my last cycle was Mar 2nd. I had to have ovulated Mar 21 or around then because honestly that’s the only time my SO and I BD this month 😬

My <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> says I’m 4w4d but my <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">nurture</a> app says I’m 4w.

So is my due date Dec 7th or Dec 12th?