Overactive letdown ?

Kallie
Whenever I feed my 3 week old daughter it's never for more than 15-20 minutes. .. she coughs pulls away and sometimes cries abs when she does pull away my milk squirts out super strong... she gets hiccups alot after feeding what should I do to make it easier on her? She is gaining weight born at 9 pounds 6 ounces and already hit her birth weight at 2 weeks so I know she is eating it just doesn't last very long and she can't nurse for comfort because so much milk comes out so I give her I binky to help her when she wants to comfort suck. Thanks in advance !!!