Help finding the right bra size

Hi!So I used the size calculator and it gave a 32G/H. I have always wore 34 D but based on the calculator I bought 32G/H and that was extremely right band. Cups seems fine so should I just get 34 G/H now or the cup size would also change with the band size?

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Edit to add measurements

Loose Underbust - 31.5

Snug underbust - 30

Tight underbust - 29.5

Standing bust - 37

Leaning bust - 40

Lying bust - 39.5

Sizing system - US/Ca

Calculator results - 32G/H

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Also, any brand recommendations for my size? I live in USA.

TIA!