Everyone at my house has or still has a cold-cough, sneezing etc, can my dog als...
It is difficult to say what the problem is without seeing your dog. However, the symptoms you describe sound like tracheobronchitis, commonly known as kennel cough.
Here is some information on treatment from our friends at PetsMD:
There are two treatment options depending on the severity of the disease. In the most common mild (uncomplicated) form of the disease, antibiotics are usually not used. If your dog has a good appetite and is alert but suffers only from a recurrent cough, your veterinarian will often let the disease run its course like a cold in humans. Treating the mild case does not shorten the length in which the animal will be a potential spreader of the disease. Many times, prednisone is given to help reduce the severity and frequency of the cough and to make your dog more comfortable.
In more severe (complicated) cases where the animal is not eating, running a fever, or showing signs of pneumonia, antibiotics are often used. The most common ones are tetracycline or trimethoprim-sulfa. However, many other choices are available.
As always, consult with your veterinarian before giving your pet any medications.