My DS has silent reflux. Symptoms I noted with him:
- visibly bringing up "stuff" and gagging on it, grimacing as it goes back down
- sudden periods of screaming in pain, not a normal sounding cry at all and not just the usual witching hour stuff, very hard to console during this time
- wanting to feed a lot
- quite snuffly and congested sounding at times
- hiccups quite often, at least daily
- very poor sleeper day and night
- only sleeps well when held and upright
- lots of wind, difficult to get wind out of him and so lots of arching back and pulling up legs

What kind of symptoms does your bub have? Have you tried anything like Infacol, infants friend etc?