Gucci - Purely from a personal perspective, I would be inclined to try it and see how it goes. I realise the WHO guidelines say six months but in practice, there have been many people who have started their children on solids before that time (under the guidance of a health professional, similar to yourself). Rice cereal is a good start as Lea has said as it is a low allergy risk. You are also still BFing him which is an additional health bonus. Let us know how you get on.