Dear Patient,
In general, chemical peels do lead to skin shedding, which helps to exfoliate and cleanse out the pores. This may lead to your pores initially looking bigger. After a couple of weeks, they will get back to normal. If you do a series of these peels (I am guessing TCA, since I am not familiar with PCA peels), you should eventually start seeing decrease in pore size due to regular cleansing of the pores and collagen production. Your use of the wash did not effect the treatments. However, I would recommend gentle wash, sunscreen, and moisturizer (e.g., cetaphil or cerave products) for a week after your peel, to diminish post-peel irritation. Good luck.