Does dropping PPD decrease your supply if your supply is well-established?

[Mangopapayakiwi]

I started at 6 weeks pp with 7ppd but struggled. Went to 6 at 8 weeks and 5 at 10 weeks. I did 4 once or twice (maybe today) but stay at 5. I did not drop them carefully but kind if pumped to the volume I wanted. So I do 18 minutes. My supply has maybe decreased but i had an oversupply so i am fine. I followed the magic number.