You said you spent hours in the water shouting commands to the rescue ship. If you were hypothermic and close to death you would have been lethargic. Maybe if you had quit trying to shout orders to the captain and conserved your strength you wouldn’t have ingested so much seawater to vomit?
Many people survive in the sea with PFD for long durations. Some last days alone, in typhoons, threw nights with no ship in sight to buoy their spirits.
You were simply terrified (and rightly so), uncomfortable and that makes you a poor witness to the events around you.