Overactive let down

How do you ladies deal with an overactive let down? My Little one is 3 weeks old and I feel like I’m drowning her. She gets fussy at the breast, coughs and only nurses for a short amount. I’m a second time mom and this didn’t happen with my first. Not sure what I can do to help with this. She nurses often at night every 1-1/2 hours because she’s only getting the foremilk. Anything helps!