Yes. Sweetners are a bad thing. They make me gag. Also, they give me D. Stevia, and well...sugar of all kinds are the only safe kind. Honey, though, gives me MEGA acid. Not sugar, just honey.
Is Citrucel plain or flavoured? If it's flavoured, the flavour could be making your reflux worse. When I read the name "Citrucel" I immediately think Citrus and that's a huge reflux trigger. Benefiber powder has NO flavours, no sweeteners.