What does your schematic look like? Since you probably just joined it might take a while before you can post schematics and even links.
What will help is the voltages at Vin, Vout and adj relative to ground and the voltages across the divider resistors.
If you used the diode that is between Vin and Vout, the diode can be installed backwards.
The schematic should be simple enough that we could spot the errors, if you posted bit sides of the PCB. You can use go advanced/manage attachments to upload attachments.
One other possibility, is the lack of a load. Load the output with at least 20 mA.
If you used a potentiometer, make sure the resistance varies as expected. Confirm the resistor values with in-circuit, powered off resistance measurements.