DS 6 months has been noticeably drinking less over the last few days. We did a rough weigh of him tonight after he brought up most of his bottle, by our measurement in the last 10 weeks he has dropped from 50th percentile to 0.4, which I am shocked. He has always had problems feeding, been on Gaviscon and finally GP suggested changing to soya formula, which did stop the vomiting. He is refusing solids, just not interested so we haven't been pushing it, and I am feeling upset that i haven't noticed before how much weight he had lost. I am going to GP tomorrow but any suggestions as to what might be wrong or what should happen, and can I insist on a peadiatric referral.