Very sorry to hear your story. About 15 years ago I flew MAN-AGP and due to a delay was diverted to fly MAN-LGW-AGP with a change of crew en-route. Shortly after boarding I fell ill in a similar way to you, ended up also wrapped in a blanket as I didn't have spare clothes. When we landed in LGW the crew considered disembarking me, but apparently for various reasons it would be quicker for me to stay onboard to AGP then try and disembark in LGW.
Walking through an airport stinking and old wrapped in blankets is embarrassing so I feel your pain.
Since then I ALWAYS travel with a spare set of clothes in my hand carry and incredibly cautious what I eat before travelling.