You're welcome for the recs - any time! I am always happy to go on and on and on about POI. (And on, and on!)

I have no idea how to even bring it up to my GP without sounding like a faker.
Oh, man, no. If they think you're a faker, they're a bad doctor.

If it helps you to bring up the topic, I'd suggest filling out a checklist and taking it to your GP? This one from Beyond Blue is good: Anxiety and Depression Checklist.