NCP1117 Regulator voltage feedback not working correctly

I'm having a brain fart. Reading 3.1V ish on the output. My +5V0 net is after a schottky diode with 5V + a little bit coming from the NCP1117, and another 5V0 coming from a USB connector. Reason being I want the regulated voltage after the diode to be 5V, accounting for the diode voltage drop.

My feedback resistors look fine, I checked the parts on the board and they look fine, and my input looks solid too.

After the +5V0 net is a 3.3V regulator for 3.3V logic stuff. That's about it. The +5V0 only powers a handful of devices which seem to be functioning correctly with the 5V0 USB going through the diode and only powering to about 4.6V.

LINK TO DATASHEET

Any clues?

Thanks in advance