Sick building syndrome normally only affects people who are in buildings for extended periods like office workers, I did a survey at five ways tower in Birmingham last year which has been empty for 12-15 years because of sick building syndrome but in the 2-3 hours I was there I had no ill effects.
I used to feel similar in marks and Spencer’s though as a kid, could be something in the air conditioning, it could be anxiety, are the aisles spaced unusually, that can mess with your brain, Asda by me is narrower than standard, it’s one of the reasons I don’t go there. (The people is the other one)