Alycat, you probably measured not correct.
If you use inches, maybe you did mistake in covertion to cms?
LOOSE in bust level, nipple level! And straight. Our boobs aren't made of silicon, so it's better to bend down a little. If you can't measure yourself, ask for help f.e. sister or friend.
Underbust - straight and TIGHT.
Band is basic. It supports 90% of weight:
How should it look?
6: It's only to make it all stabile. It's not for support. If you don't have support, choose smaller band.
7: Band should lay straight. If you can tie your band, it's really too loose. Use first fastening in new bra. Every fabric stretches, so tighter are for later.
8: Your back should be smooth, no fat above is allowed! If you have sth like photos below, choose bigger cup - I said CUP, not band!
9: It's a strap, not shoulderbreaker. If it pinches, choose smaller BAND.
Can you see she has each boob in its own cup?
Bra is not a cover - it's Perfect Support Machine!