I have to agree with Rob, everybody who has Lupus is different, no two people have exactly the same symptoms.
Like Rob, I have never had the malar rash. My main problems are joint & muscle pain, sun sensitivity ( no rash, but more pain and stomach problems), fatigue and brain fog. I do get mouth and nose sores and other weird things from time to time.
So you can see, we all have some or all of your symptoms.
To me it sounds like you do have Lupus, but only a rheumy can diagnose you.
Wishing you all the best.
I may have been dealt a bad hand, but at least I'm still playing with a full deck. ( most of the time anyway).