Where is my milk

Kaye • OB/L&D TECH. Second girl due in November. Hoping for a vbac

So I had my baby almost two weeks ago. My supply was insane and I was able to pump so much along with feeding my little one. Now my milk seems like it’s gone. She’s constantly at the boobs and after five minutes starts crying like she’s not getting anything. I hear her swallow so I don’t get it. She’s not content at all. And I just don’t get it. Is she just cluster feeding or is my supply dwindling already :(