I've had dives like that :( My first couple of dives in Galápagos I was so seasick (despite having taken tablets) that I was throwing up until we got in the water. I was still fine once under, but the second we were up and bobbing, waiting for the boat, I got queasy and 2 mins back on board, did me in completely. It was a full day diving so yeah, not much fun. Even worse was that the visibility was awful and I missed a manta ray while clearing my mask 😑