Hard to tell from my small screen, but it looks like she's starting to spring already. So she was bred when she was 11 months old, but you're not sure when she was bred? If she was bred at 11 months old, that would have her calving when she was about 20 months old. If she's getting fed really well, you might be better off if you backed her off a bit to avoid the calf getting too big. Might be a bit late now.
Any idea if the sire of her calf is calving ease? I'd sure hope so! Watch her closely.
Best of luck to you!