Infant allergies?

Julie
Has anyone had their lo tested for allergies yet and if so what was done? My girl is little over 12 months but since she turned 5 months she pretty much keeps congestion,runny nose, cough, mild skin rash of bumps or red dots. History of allergies pretty bad on both sides and pediatrician even feels it is allergies but didn't want to test until after a year old. Did your lo have testing done and how did they do it? What was the outcome and what did you have to change? Any help is appreciated greatly!