Poppie, I know you didn't ask ME, but she means Robitussin. Or the store brand, it's guaifenesin. Make sure you get plain Robitussin, not the kind with any other active ingredients. It thins mucus (everywhere in the body, not just when you're congested), so it helps you have more of the fertile CM when you are ovulating. Praying that I do ovulate this cycle....but I'll be using guaifenesin, PreSeed, and softcups.
Yes, I figure the more things I use, the better!
And I just realized that I said "you" in my last post. Obviously you don't need it. Unless you want to get pregnant again while already pregnant with this one!