Low milk output

My baby is 6 weeks. I was breastfeeding and have been pumping. I now pump during the day and breastfeed at night. I was pumping 5 ounces on each boob every 4 hours. Since yesterday evening I haven’t been getting much. I only got 3 ounces on one and 2 on the other. Then this morning I only got 3 on each. And now only 2 ounces on each My first period has just started. Does this affect it? I’m panicking a bit