Hi, I Have Been Diagnose With Rosacea, But I Think

Hi, I have been diagnose with Rosacea, but I think I have Demodex Mites. What should I have the dermatologist test for versus just looking at me and giving me an inaccurate diagnosis. My face is itchy on my forehead, cheeks & nose. I've never had skin issues ever until I had started having "Hot Flashes", can you please offer some advice.

Thanks,
LIsa