Pregnant and nursing mamas

I’m pretty sure I’m drying up based on the sudden uptick of solids and water intake of my 18 month old. He’s still nursing but definitely not satisfied with it and grabs his water cup when he’s done. I can still hand express milk so I know there’s some there, but have only even felt letdown once in the last month now.

My question is, did you fully completely dry up or still make a little something until your milk transitioned to colostrum? Around when did you start noticing colostrum instead?