No, your blood tests aren't wrong, but what about Behcet's Disease?
It's rare, so your doctors may not be that familiar with it - we are in the herpes forums because it can cause genital sores - but since yours is systemic (affecting your entire body), it seems like it may be something like this.
Herpes wouldn't affect your WCB, either, and I'm not sure Behcet's would, but I found this - https://pubmed.ncbi.nlm.nih.gov/25527038/ I'm not sure how helpful it is, but it may be a starting point.
It could be lupus, obviously, or something else, but I don't think it's herpes. I almost wish it was, because herpes would probably be easier to manage.
The herpes tests are really reliable with not giving false negatives. You could always test again if you want to, but herpes also wouldn't give you systemic symptoms like this. It wouldn't give you symptoms on your arm, for example. Herpes infects nerve groups, so you'd only get symptoms in your genital area or your facial area. You might get nerve pain in your legs, but it doesn't ever affect the elbow, for example.
I'm so sorry you are so miserable, and I kind of wish I could tell you it's herpes and give you an actual answer as to what's causing your pain so you could figure out a way to stop it. I can see why you would think it is herpes, but your tests and body rashes say otherwise.
Oh one thing - Are you in Canada? (You said you took canesten, and I know that's what they call clotrimazole in Canada.) If you are, you're very lucky that you even got blood work in Canada. Can you check to make sure it was IgG blood work, and not IgM?