motion sickness while swimming--any solutions?

Hello all! I am a rookie swimmer. I began swimming last year to train for a sprint triathalon which I competed in last fall. In the middle of last year, I began having problems with motion sickness after swimming. I have tried swimming with and without ear plugs, with and without contact lenses (I always wear goggles), drinking a lot to ensure hydration, wrist bands with acupressure tabs meant to alleviate the effects of motion sickness, I've tried swimming in indoor pools and I've tried swimming in lakes. Sometimes it's worse than other times, sometimes it's better and I haven't noticed that any of the above variables have made a consistent difference. One doctor told me to try dramamine and I haven't yet tried that, but it seems like kind of a stop-gap solution to an ongoing problem. The last time I tried swimming, I was only in the water for about 10 minutes. I got out because I was feeling a little dizzy and I wanted to see if I could shake it off, but I ended up getting dressed and going home where I felt a bit wonky for about an hour. I have also tried to "push through it" when I felt the nausea coming on, thinking that maybe if I kept going, that it would go away. I was socked with two solid hours of nausea for that attempt. I am rather frustrated with this phenomenon, so I thought I'd put the question out there and see if anyone has any suggestions. Thanks!