Idk what to think

Yesterday my breast were full constantly all day. He nursed this morning and I feel like I have zero supply! They are super soft and have been all day. I haven’t leaked hardly at all, yesterday I soaked 3 shirts (didn’t wear a bra/pads). I barely feel letdown. I’ve had zero problems with breastfeeding or my milk supply. It came in quickly and he’s a great nurser. Born 3 weeks ago. What happened?