If there are no medical facilities accessible to your daughter, the use of over the counter medication could be her best option. But that is rarely the case. Treating in a 'shotgun' fashion is hazardous, especially the treatment of a respiratory infection that seems to be moving to her chest. The chief hazard is the delay in diagnosis and appropriate treatment, while waiting for, what may be inappropriate therapy, to take effect, while the infection progresses. In addition, depending on where she currently resides, there may be infections peculiar to that area, not seen in the U.S., but
commonCommon cold there and readily diagnosable with reasonable certainty by medical caregivers in the region.
The best advice we can give is for your daughter to take whatever measures are necessary for her to be seen by competent medical practitioners and have a chest x-ray.