Totally random, but I pumped 4 extra oz in my first pump at work session...

I usually nurse one side and pump one side at home (5 or 6 oz). Then I usually pump 5, 5, 4 oz in my 3 sessions at work.

The last two days, I've been nursing both sides because DS has been extra hungry! so I just pump 3x at work. Yesterday I only pumped 4 oz. in my first session at work, today I got 8?!

Has this ever happened to anyone? Will I pump less in my next two sessions?