Bra intervation helpplease

[IfIDontKnowAndYouDontKnow]

I'm measuring 33inches under my bust and 41 on my bust. What size would this make me? So confused. Went into town the the other day and got told a d cup and in other shop an f cup? [Confused]
Am desperate as I get married nest Sunday and need a strapless bra with a lot of support.

Apologies for the title mistakes. Am on tablet with dd on my lap, & in a rush!

i would try a 32 g i think?

Because you are an odd number underbust you will want to try sizes either size. You should start by trying 32G, 32FF, 34FF and 34F.

Let me guess, the people who tried to put you in a D cup also tried to put you in a 36 or even 38 band?