I'm from Belgium and I'm traveling by car from Canada to Patagonia (Argentina).
I left the USA just in time (90days) but I got my visa from Mexico 1 day 
after my (90days) VWP expires. 
My plan is to drive to Patagonia and come back to the USA in 6 months. 

Will it be a problem if they see at the US airport that I got my Mexican visa after my US VWP was already expired?