Going one extra hour without pumping?

My son is 9 months. I have been EPing for the past 3 weeks.

I pump every 3 hours (for 30 minutes each session) while awake. I pump 4oz each time. I sleep for 6 hours at night and pump about 8oz when I first wake up.

My question: if I am busy and I accidentally push back pumping one more hour (4 hours in between instead of 3) will that hurt my supply? My supply seems fine right now. I pump roughly 30oz per day.

I’m new to exclusive pumping so any advice would be appreciated 🤗