I didn't know an exterminator had just sprayed at the gym and worked out right afterwards, is this bad?

So evidently, an exterminator sprayed down the gym I go to at around 2:00 and I showed up an hour later, oblivious to the fact (and with no one else there), and lifted weights / did cardio for about an hour, meaning belabored breathing and winded breaths and all that. I could smell the fumes pretty strong -- but I didn't know they were really pesticides -- and the rampant air fresheners in the place masked the odor for the most part. Afterwards I had a bit of a headache (I get them regularly, so whether there was a relation or not is beyond me). Could this type of exposure have been harmful to me? Did it probably kill brain cells? Will any of the chemical constituents of the pesticide(s) bioaculate and persist inside my body for weeks/months/years? By and large, pesticides are incapable of discriminating between insects and mammals - they target nerve cells no matter the species - which means it's the dose that makes the poison. They'll devour cognition in humans alike if the exposure is adequate, and the exterminators themselves armor up in jumpsuits/masks as proof of the fact. Is it inevitable that a certain amount of brain function was lost?