Can you see another doctor or get a referral to see a pediatrician? I had 2 doctors tell me just to monitor DD2's silent reflux and i said to hell with that! The poor thing was in pain and arching her back and screaming through every bottle. I finally found a doctor who had a degree in child health and he put her on meds straight away. She is now the most happiest baby. She still has moments where the acids hurt her when they come up (which we're seeing a paed on Tuesday to get her meds upped) but she at least will drink her bottle now without any fuss. So definately listen to your instincts and find another doctor or pediatrician as in my eyes its not right for them to be in pain when it is treatable. If left untreated can cause serious damage.
Best of luck hun xx