Good job on the photo!
It does look like she's got mites. Given the info about your bird and the exposure, the pic does look like it. They don't always present the same way in different individuals.
Psittacosis (Chlamydiosis/Parrot Fever/Ornithosis) is now (officially called) Chlamydophila .
It is transmitted via ingestion or inhalation of the bacteria. Birds may be nonsymptomatic , asymptomatic (just one symptom is noticed) or be unmistakably ill with respiratory distress, lethargy/bottom sitting, diarrhea and urates being yellow or a lime green.
It's not likely without exposure to other birds you don't know - and while she might have brought it from her breeder's, after this length of time without any symptoms it's not something I'd suspect. Anything is possible, but not everything is likely.
Now, just in case it is psittacosis, remember, you've caught this early and that's excellent.
Psittacosis is a reportable disease in most states. You need to notify your CDC (Center for Disease Control) or have your vet do so. If your vet diagnosis and is treating this problem, they'll have to notify the CDC.
Testing techniques are varied, but the most certain is a PCR DNA and my recommendation is to simply start with that one instead of trying others (and ending up with the PCR DNA anyway).
The only treatment is supportive care and probably a course of antibiotics. It's vital that you administer the medications exactly as prescribed and for the entire duration of the med, not just until the symptoms let up.
That is IF it's this problem.
Conjunctivitis is a result of something, not a condition that occurs by itself. It's possible to see conjunctivitis in a bird with a fungal infection, bacteria or viral problem.
She's really a gorgeous bird and I understand why everyone is concerned. It would be a very good idea to have her seen this week and please let me know how it turns out ok?
Just re open this question - do not press accept again - I'm anxious to know how it goes. Would love some good news (and I expect it will turn out fine).