Girls only please? Bra sizing help?

WaterNymph611
I'm wearing a 30H. The band fits great, but the cups are way too small and I have the double boob effect. And when I wear a 34E, the cups fit a much better (still a little small around the center) but the band is way too big. What size shoild I try? (I'm a US size for both)
Updates
+1 y
Under bust: 29in
Bust: 37in
Girls only please? Bra sizing help?
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