Does anyone with large breast have this bra problem?

I'm a 36K UK 36P US. One of the biggest issues i have is that my bra tends to be the biggest i can buy and i just fit into it. I don't pop out i'm not popping out down the sides, or falling out the bottom. But i have noticed on every bra i get the bottom has like an inch of extra fabric and the middle just doesn't sit flat against the m y breast bone like it does for other girls. I tried going up a cup. but that doesn't seem to fit very well. I have to much cup. I don't think i could go down in the band to 34. My 36 when i buy it is quite snug. What should I do?