Hi I Had An Anti Dna Ds Ab Qn Result

Hi I had an anti dna ds ab qn result of 14 1 month ago.
I haven't been feeling well I feel similar to when I had mononucleosis yrs ago, but no sore throat. I had a pulmonary embolism (1 small clot) in right lung 4 months ago. What could be going on? I don't have any symptoms of lupus besides the lab above. When I had the PE I had a positive ANA tests then 2 months ago it was Negative. I have muscle pain and fatigue and my knee and elbows hurt sometimes. Been experiencing anxiety through all of this for passed 2 months really bad.