Question about milk production

I was a 32A forever. Like the smallest size it comes 😂 I'm 6 months pregnant and have already jumped nearly 2 cup sizes! (Pretty happy about that, not gonna lie, although I know it won't last 😝) 
my question is: is that a good indication that I'll produce enough milk? 
I've always feared that I wouldn't so I'm hoping jumping up two sizes is a good sign.