Patience, I was worried about the blouse in the chest area as well, because that sort of detailing tends to poof out on me and make me look like I'm wearing a tent. This top didn't do that at all, which is part of the reason I love it! Did you order it in the papaya or the shell color? I think with your skin tone both would look great!
J. Crew cashmere runs large. I usually take a Medium (occasionally a small) in J. Crew tops, but I always take a small in the cashmere. I just got my cardigan yesterday and the small fits great! XS should be good for you, and the Clover will be wonderful with your coloring. Remember it's a "shrunken" fit which means the sleeves are very fitted and 3/4 length, and it hits at my hip bone, which is kind of high but looks cute layered over a longer top or with a skirt. I think it would be really nice with a poufy circle skirt.
Will you post a picture when you get it? Lisamartin ordered the geranium, and I did too, so we'll all have to compare notes.