After I posted my response, I realize I missed your comment about the scab. That symptom (and only that one) does raise my suspicion about herpes a little bit. Only a little, but perhaps worth checking out. You might want to go ahead and have the herpes blood test.
HHH, MD
Your symptoms don't sound like herpes, which does not cause prolonged tingling or itchiness, dry/flaky skin, or "spots" that remain more or less unchanged for weeks at a time. You are wrong about herpes being the "VD you can't really test easily for". Accurate blood tests are available to determine whether a person is infected with herpes simplex virus type 1 (HSV-1), HSV-2, both, or neither. You could be tested, whether at a walk-in clinic or elsewhere.
But regardless of the result, I am certain herpes is not the explanation for your symptoms; and since 25% of the population has HSV-2, you might find you are infected but still not know what's going on. See a health care provider if your symptoms persist; at a minimum, s/he will be able to tell you whether the "spots" are abnormal or not. In the meantime, it is unlikely you have an STD or anything you can transmit to a sex partner.
Good luck-- HHH, MD