It may or may not be symptoms of acid reflux.
Acid reflux generally is helped by taking an antacid like rolaids.
Acid reflux may be helped signifcantly by just drinking a bottle (16 oz) of water 20 to 30 minutes prior to a meal not with the meal though.
If the symptoms are the result of a spasm the water before a meal, and supplementing with magnesium may help.
It may also be she is suffering from a food sensitivity, and that can be easily determined by just writing down everything she ate the days the symptoms occur. Then compare with other days notes for the same foods, then do a test of that food. Remedy is simply to avoid that food in the future.
My wife suffered similar symptoms and found that eliminating all wheat and gluten from her diet resolved the problems - but it took 7 weeks to take effect.
Good luck and God bless!