Supply / pp periods

I restarted my periods this week at 16w pp, I’ve noticed the last couple of days a noticeable dip in my supply.

Is this because my body is working on something else at the moment? Has this happened to anybody else and did your supply come back?

Offering my baby more milk to try and help it come back up.

(I know I’ve dipped because I pump morning/evening for my stash, usually average 10oz a day from those two sessions 7oz am and about 3oz pm - but since I stated my period on Friday I’ve ended each day on 6oz and have changed nothing otherwise)

Thanks!