welcome to HCM,
as per the details u have submitted , the guaiphenesin tablets you are taking doesnt work as a mucolytic
,, instead it will work as a anti-tussive
agent ,that is used to get relief from cough
MUCOLYTIC AGENTS WHICH ARE AVAILABLE OTC :
pills which containing either bromhexine or ambroxol preperationa are available as low-cost medicines , and u can use them until you get money sources for buying N-acetyl cysteine (mucomix)..
i hope i have cleared your querry...