Rookie mistake

Tuileries Garden, Paris near Louvre I've been running in the mornings lately, but due to work/family related stuff needed to do my long run (30K) in the evening last Friday. I started running around 18:15 and felt bloated from the first steps onward, bit nauseous even. It's not my first rodeo and normally these bloated, nauseous feelings subside in half an hour to an hour or something. Not this...