Feeling sick after swim practice?

I went in for one on one with my coach and was feeling good until he told me to put my head down more for freestyle. I did that and when I finished my laps, my head was aching.

I have a massive headache now, I get really dizzy when standing and I feel like I may throw up.

I swam two days ago so it's not like my body wasn't used to it. Any ideas on why? I want to avoid it.

Katie Le2014-08-31T20:08:35Z

Take a break from swimming and rest. This happened to me twice at a swim meet. I wanted to go to the finals so I swam super hard and took like 5 breaths throughout my 200 yards. I vomited after. I was stupid but I was too sick to compete in the finals.