Hospital Grade Breast Pump

Hi everyone, I’m trying to buy a good hospital grade breast pump. I am a month pp, and I only get 2oz combined when I pump with the breast pumps I got through my insurance.

I want to increase my supply with a hospital grade breast pump but I’ve seen both good and bad reviews about the Spectra S1. I don’t want to waste $200 if it’s not going to work.

I wanted to try “Dr. Brown's Customflow Double Electric Breast Pump with SoftShape Silicone Shields Hospital Strength”, because it’s in my budget, but is it worth getting? Is this pump strong enough to empty me out?

Also, am I an undersupplier?

Thank you