To ask of this could be PCOS?

[Jaboody]

Always tired, always hungry and not able to lose weight unless I starve myself.
I'm 39 this year. I run every day for 5 miles eat healthy and low calories on myfitnesspal
Slept for 12 hours yesterday as I figured I'd just over done it with the 2 short walks with toddler.

It could be, but it could also be other things such as thyroid or B12 deficiency. PCOS usually also would include things like acne, low sex drive, excess facial hair and irregular or non existent periods. The only way to know would be to ask for blood tests and to have an internal scan

Have regular periods bar a day or 2 late or sometimes a day early. I'm just so fed up exercising for nothing.