I can't believe your doc said that if he doesn't chuck heaps and is gaining weight its not reflux! Babies can go either way as many reflux bubs over feed to try and soothe their throats as for chucking that has nothing to do with how much pain or damage to their oesophageous. My dd had silent reflux so no chucking but major pain, screaming, crying, no sleep, feeding issues etc. at the beginning she stacked on the weight it was only at bout 6 months she started losing weight and dropped through the weight percentiles. My son on the other hand is a massive speeder but his reflux pain is nowhere near how bad my daughters was. I am a member of RISA come and check out the website and Facebook page if you want some support. I am so sorry you are going through this you need a supportive doctor!