I have been officially diagnosed with undifferentiated connective tissue disease. My first tests 3 years ago showed a positive ANA then a positive SCL-70. Repeat SCL-70 has been sometimes positive but since negative. We "waited" to see where it would go. Since then I have had neurological episodes, 2 seizures, and a bout of left side weakness a year and a half ago. I have since been on Keppra for seizures and now plaquenil for UCTD. I consistently have a low C3 and C4. Does this mean my disease is more on the side of lupus now?