When Daddy Discipline Went Too Far?

I've been a bartender for five years now and have recently started exploring my interest in being a Daddy to an adult submissive. It's strange because I never saw myself going down this path, but it just seemed to fit who I am. My partner is someone I met online, let’s call him Jamie, who was intrigued by the idea of playing out a DD/lg dynamic with me as his father figure. At first, everything went smoothly. We spent time getting to know each other and established some basic rules and boundaries. There were moments where things got intense but it all felt consensual and we communicated openly about what made us both comfortable. One night though, after a particularly tough shift at the bar and feeling emotionally drained from dealing with difficult customers, I returned home late and found Jamie waiting for me. He was upset because he felt I hadn't been paying attention to him lately. We started arguing which quickly escalated into an intense discussion about our expectations in this relationship. Feeling frustrated, I decided it would be best if we took a break to sort things out on my own time before continuing with the dynamic again. But instead of taking that breather, I snapped and delivered some harsh words and physical punishments which were supposed to just be playful reminders but came off as too rough. Afterwards, there was an awkward silence between us as both realized how far this had gone despite our initial agreement on what would be acceptable behavior. Now we’re stuck in a place where the line between play and reality feels blurry and I'm worried about crossing it again or pushing Jamie away completely. Is this normal for a DD/lg relationship to have these kinds of bumps? How do you know when to back off versus push through tough times?