One drain removed and ml increase on remaining drain

I had one drain removed that was under 20cc for 2 days. Yea me!!
The other drain was measuring 25-30 so going back to doctor in four days. Hoping for under 20 for the second drain to be removed. Except, now my one drain went up to 29 yesterday and 42 today. Is this normal? Does the drainage simply shift because I went down to a single drain? Or am I doing too much walking and working (work from home at desk all day) during the day. I really want to get the second drain out, on four days so any advice or knowledge would be appreciated.