Pain need not necessarily be due to the enlarged lymph node. A lymph node typically enlarges following an infection in your stomach and that might be the reason it has settled down after medications in the follow-up ultrasound scan. Since you’ve mentioned blood in urine, the dull pain could be because of an urinary infection.
Next Steps
Review with your doctor regarding the dull pain
Health Tips
Adequate hydration and addition of cranberry juice might offer some relief if you’re experiencing an UTI.