Woo! Where abouts is your op? If it’s the same as mine I can give you some advice about hotels etc. 375 will definitely be a D, but remember that boobs look atleast one size smaller under clothes. You might be a small E and look like a D. I have 480cc uhp overs and i’m wearing a 34E sports bra, so the difference is 105cc less that mine and I’m an E, so I’d say you’d be a D approx. Try not to worry! xx