My son is a healthy 2 year old. He has always had infrequent urination and was easily potty trained. However, I am now starting to wonder if it is a symptom of something wrong. He only urinates 2-3 times a day and never at night. He drinks plenty of fluids and his urine appears to be a normal color and amount. It is not uncommon for him to go 8 hours without urinating. Should I be concerned?