You really shouldn't feed bubs solids earlier than six months b/c they can develop food allergies later in life and also their tiny tummies aren't ready to cope with food. There is a valve in the stomach that remains open until 6 mths, which aids digestion of BM/AF. You will know if your little one is ready for food, they show a real interest in what you are eating, open their mouths wide and don't have the tongue thrusting reflex - where they push out food with their tongues. My DD is nearly 7 mths old, ff and even though we have introduced solids, she isn't really interested, a few mouthhfuls and that is it. Remember that milk is the main source of food for babies up until 12 mths. I'd get back to Barb with the info she has asked you and persevere with the BF. Even though your DD was born large, your body should make enough bm to satisfy her, good luck sounds like you've had a couple of rough patches.