bathing suit problems

Life

Hey guys I have never really posted before this is my first one. I always have problems finding bra's that fit and are comfortable but even worse than that I have a harder time finding bathing suits. I'm a 34DDDD or 34G at 16 and it's really annoying because if I get something that fits my boobs then it's way to big in the number size and they fall out underneath but if I get something that fits to my number size then it's way to small around my boobs, pair that with being a conservative person and it makes it nearly impossible to find a bathing suit in my size and I was wondering if anyone had any tips or suggestions. Thanks.