I feel like pulse or blood moving at my transplanted kidney place? It's started from 3days ago not continuously feel. The transplant was 84days ago

May be complication. The transplanted kidney is closer to the skin when compared to normal kidneys. You may simply be feeling the blood flowing through the kidney. However, this is unusual. A possible complication is a pseudoaneurysm. This is a slight disruption that occurs at the site where the blood vessels were sewn together. You can sometimes feel this as blood flowing through an area. Diagnose with an ultrasound.
See your doctor. Your doctor should see you and be sure that everything is okay.