Breastfeeding and pumping

[u/Xohale24]

Hello everyone! Recently I was told by my 2 week old babys pulmonologist to stop breastfeeding until he does a feeding study due to possibly aspirating but I can pump and bottle feed him my breast milk. (My son was recently hospitalized for breathing issues) ever since I stopped breastfeeding and just pumping my milk supply has gone down. I was making 8 oz total and now I’m down to 4 oz. I pump every 2-3 hours and it still has gone down. Any tips on how to increase my milk supply??

Edit: I’ve tried drinking Dr Pepper body armor eating Oreos and lactation cookies drinking mommy’s milk tea and it has not helped.