I had a co2 blood test done and it said i was at 27, which is close to 30 (hypercapnia). should i be worried? i had a brief exposure to concrete dust

TCO2: tCO2 on the blood test (usually electrolyte panel) represents bicarbonate (sodium bicarbonate) and volatile CO2 and is different from arterial CO2 = partial pressure of CO2 in the blood, which is done usually in the hospital setting. most adult values are in that range (24-32). When it is high it suggest that you may have chronic respiratory acidosis, but 27 is fine