Brett, you may have some other restriction in your water piping if the
flow is so inadequate.

If you found the regulator, to increase pressure, loosen the jam nut on
the screw on top of the valve body. Then turn the adjusting screw
colckwise to increase the pressure. Then tighten the jam nut again.

If that doesn'y help. you may need to call a plumber to help diagnose
the problem.

Stretch