Just lost a lot of weight. These measurements can't be right?! 36D to 34DD, but calculator says FF?

Hello, fellow bra wearers and aficionados.

I've just lost an awful lot of weight. I was in a 36D, and thought I was a 34 DD. I'm clearly wrong and am now I'm struggling w/a bra that fits. I've done my measurements but they sound all off. A sanity check from anyone would be most welcome. Measurements in inches...

under bust: 35.5

under bust s: 34.5

under bust t: 32.5

standing: 41

leaning: 44.5

lying: 41.5

I can't be a 34FF??? Or can I??? have I been doing everything wrong for the last several decades?

Many thanks!