B737-900
Flight Attendant Current
Physiological - Other
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General Physical Injury / Incapacitation
Aircraft
I started to feel nauseous during the flight from ZZZ1 to ZZZ. After we completed service; [Person A] and I started to smell a strong sour milk smell in the aft galley. It came and went about three times. We could not find a source for the smell; and no passengers complained of anything. The last time we noticed the smell was before descent. At this point my nausea had gotten worse. During final descent I started to feel a little lightheaded and dizzy. I thought it was getting better; but when I bent down to disarm my door; I had a hard time getting back up from being so lightheaded. At that point I asked [Person A] if she was feeling ok. She said she had been feeling lightheaded. So during deplaning I called the [Person B] and let her know what we were feeling. She told the Captain who suggested we talk to a supervisor and get checked out in case it was a cabin air quality event. We were met by a supervisor who then called EMTs to check us out. We decided to then go to the ER where we got blood tests; and it was determined that we had carbon monoxide poisoning. We listened to our bodies and paid attention when something was out of the norm.
Flight Attendant reported a 'sour milk' smell was noticed during flight resulting in health issues. Post-flight diagnosis determined it was carbon monoxide poisoning.