Hi and welcome to the GERD forum.
Many times those with Silent Reflux or LPR also have post nasal drip so an antihistamine may be helpful.
I also know we all have to modify our lifestyle and diets in order to aid the meds...as they can not work alone.
Last it can take up to 3 to 4 weeks b4 u start to see improvements....so give it more time and modify ur diet ad lifestyle and see if u see a difference.
I have LPR- had it since 1997- it is horrible- took forever to diagnose since I rarely get any heartburn- I have waht is called cyclical vomiting- when i am in the cycle anything I eat makes me cough and vomit and vomit violently- for days or weeks- sometimes even on awakening- always clearing my throat- NONE of the gastro- tests showed reflux- I have been on meds for years- was on twice the max daily dose of nexium for yrs but new ins wont pay so now on protonix twice max daily dose- was on reglan also over 10 yrs and all of a sudden I got tardive dyskinesia from it- very scary!when not in a cycle I can eat hot suace, chili, tacos anythign I want and have NO reflux- dr says possibly related to stress