Failed 10k time trial

I was supposed to do a 10k timetrial this morning but my guts and bowels were not my freind and after 4 stops iin the warm-up I felt week, nauseous and was staggering. Went home and slept and flet weka with a dull headache all day.. not happy. Total 7.6kms @ 5.33min/k; Ave Hr 137bpm