Stressed about baby’s weight. Anyone else experiencing this?

My son is 3 weeks old today and I am exclusively breastfeeding:

On his birthday he was: 6lbs 5oz

Two week follow up: 6lbs 8oz

On Saturday: 6lbs 14oz with a clean diaper

Today at 3 weeks he was: 6lbs 11oz with a dirty diaper.

I’m so stressed 😪