Você deve estar bem. A regra destina-se a impedir que as pessoas usem viagens curtas para contornar o limite de 90 dias do VWP, e isso claramente não é o que você está fazendo aqui.
Consulte o site do Departamento de Estado ( link ):
Trips to Canada, Mexico, or nearby Islands
If you are admitted to the United States under the VWP, you may take a short trip to Canada, Mexico, or a nearby island and generally be readmitted to the United States under the VWP for the remainder of the original 90 days granted upon your initial arrival in the United States. Therefore, the length of time of your total stay, including the short trip, must be 90 days or less. See the CBP website. Citizens of VWP countries* who reside in Mexico, Canada, or a nearby island are generally exempted from the requirement to show onward travel to another country* when entering the United States.