DMV Appointment Confirmation Email??

I am one of the unlucky that has to renew my license because I don't have the REAL ID star. I THINK I made an appointment. I was able to choose a time, it sent me a text with a link that I clicked on and it just says "appointment set". But no email with any confirmation number! The DMV states you must have a confirmation number when you come in!!! So I tried it again.. picked another time the same day and SAME EXACT THING happened!? Anyone out there know if they send you an email with the confirmation number right away or do they send it maybe a few days ahead of time???