As mentioned, nausea and vomiting are common symptoms of anxiety and stress. While vomiting can be a symptom of anxiety, it's not as common as nausea. Behaving anxiously activates the stress response.
On December 8, 2016, Cinemax and Sky1 announced they had greenlit a brand new series of Strike Back with a brand new cast, no longer focusing on former stars Sullivan Stapleton and Philip Winchester. Daniel MacPherson, Alin Sumarwata, Roxanne McKee and Warren Brown have been cast to star in the new series.
So nice of you Kaitlin to write about Strike Back. The final season really moved me and I wish the show got the credits it deserves. Scott and Stonebridge probed many people wrong in the final season.