Welcome back!
I've learned that if I were to have a drink today, it would take about 3 days to get sober. That's because the hangover and withdrawal is ugly enough that I try to taper my way back to sobriety. Physically that's about a 3 day process for me. Mentally and Spiritually it's much longer.
I know a guy that drank and it took him 6 months to get sober again. Some never make it back.
Learn from this experience.