Not sure I believe my bra size ?

I feel slightly stupid posting this but no way am I asking my friends about this face to face. I recently went to Victoria’s Secret and my friend told me to get measured again since I haven’t been for a couple years. The consultant told me I was at a 34D. I tried on some different styles that size and they fit so I bought a few since I was needing some anyways. I’ve been wearing 34B. Even though the new ones fit I don’t feel like my boobs “look” like they are D cups. When I showed my husband he was having a hard time believing it also but they fit sooo.... what do you all think? Also I’m just wondering if anyone else has ever had this or felt this way?

The bra I’m wearing in the pics is a 34B.