The right side of my head has not grown as good as the left side, now 3 months from my FUE

At 3 months, all of the grafts may not have started to grow. It is not unusual to see non-uniform growth in a hair transplants but by the 8th months, more than 80% of it should have grown everywhere and even out the difference if there was no problem with the surgery. Otherwise, speak with your surgeon by the 9th month.