I was practically in tears at the end of my first maternity bra fitting trip at 15 weeks too. Got completely contradictory advice from Myer, DJs and a boutique store. Have gone from a 10 B to anything from a 10c to a 12D depending on who you believe. I'm also completely in-between cup sizes in Cake. Half the stores didnt even have most sizes or only one style in each size. Ended up just going with some cheapish bras that felt good to me. No idea if they'll last but they're a heck of a lot more comfy than my old ones.