sinus/breathing problems with refux??

Hi, I have just found this website tonight when trying to find out more about my sons reflux and wondered if anyone could help at all with some advice.
My son Lewis is 15 weeks old and has been diagnosed with reflux and perscribed as i see many little ones on here Infant Gaviscon and Rinitidine. The problem I dont seem to get anywhere with the proffessionals is the fact that he constantly sounds to be very nasal congested and sounds to be all i can describe as "wet" noises when he bottle feeds. He never actually vomits but does get quite cross with the wetness and only ever feeds little and often which can be exhausting for all concerned! Unfortunatly Lewis is very complex and has been very ill from birth, having heart surgery at the freeman hospital, a tight tongue tie which has now been released with surgery and bladder reflux (to name a few things!!) so all the above could possibily be related to that....but I was really hoping that someone out there had experienced simular reflux things and for once we could have something "normal and common" to deal with! If anyone could help or give any advice it would be greatly appreciated. Best wishes to all . Jo x