Today, I finally go down for swimming. I currently have 2 swimming trunks and a goggle. I can only swam half the lap of the swimming pool. I swam to and fro for about 3 times and I am already a bit dizzy. I walked up through the stairs and rested at the stair for a while because I am so dizzy and felt like vomiting. After returning to home, I showered and online for a while, the dizziness finally left. Possible problems may be I drank the chlorinated water or I turn my head too often?