Can I use AHAs before retinol or do they cancel each other out?

I have been using an AHA facial wash, a AHA exfoliant then a retinol nightcream. I understand that the pH of the AHA products needs to be between 3.5 and 4.5 to be most effective, but is this pH too low for retinol to convert to retinoic acid? Should I wait 30 minutes before applying the retinol nightcream for the pH levels to return to normal after the AHA products?