ANA +VE and patchy nodule in the lung

[sheker]

I'm hypothyroid(since 2006) and Fibromyalgia (since 2009) patient.
In my latest blood tests ANA came +VE.Im scaring with these results.I have ribs pain started(back left) in June during my India visit, ribs pain triggers when breathing,yawning and burping.
Primary care ordered X-ray on 07/16 and it came normal.In 3rd visit Primary care ordered bone scan which gave some clue about pleural effusion, so I visited Pulmonologist.
Pulmonologist ordered several ANA tests and CT-Chest.

Here are my CT and ANA results

CT reports says "As per regular nodules identified within the superior segment left lower lobe measuring together an area of 2.4x2.2 cm.Possibly post infectious"


1.ANA SCR, IFA, W/REFL TITER/PATTERN/SJOGREN'S PANEL 1
   --ANA SCREEN, IFA, W/REFL TITER AND PATTERN  -- POSITIVE    
   --SJOGREN'S ANTIBODY (SS-A) --NAGATIVE
   --RHEUMATOID FACTOR --NAGATIVE
   --SJOGREN'S ANTIBODY (SS-B) --NAGATIVE
  
2.ANA SCR,IFA W/REFL TITER/PATTERN/SYSTEMIC SCLEROSIS PANEL 1  
  --ANA SCREEN, IFA --POSITIVE
  --SCL-70 ANTIBODY--NAGATIVE
  --CENTROMERE B ANTIBODY--NAGATIVE
  --RNA POLYMERASE III AB--NAGATIVE

3.D-DIMER, QUANTITATIVE  -- 1.35 (should be less than <.50)

4.ANA SCR,IFA W/REFL TITER/ PATTERN/LUPUS PNL 1
  --ANA SCREEN, IFA-- POSITIVE

5.ANTINUCLEAR ANTIBODIES TITER AND PATTERN    
--ANA PATTERN --Nucleolar
--ANA TITER=1.40 ( should be < 1.40)

6.SED RATE : NORMAL
7.DNA (DS) ANTIBODY    : NORMAL
8.ANA MULTIPLEX W/REFLEX 11 AB CASCADE : NORMAL
9.CHROMATIN (NUCLEOSOMAL) ANTIBODY   : NORMAL
10.SM ANTIBODY   : NORMAL
11.C-REACTIVE PROTEIN     : NORMAL
12.ANCA VASCULITIDES   : NORMAL
13.IMMUNOFIXATION, SERUM  : Normal pattern

ANA was -VE in last November.Pulmonologist mentioned in latest results ANA is at border line.
Is this possible to have ANA +VE in infections? or due to Fibromyalgia?  or do i have LUPUS?  

help me, please!