My family & I are huge fans of Traditional Medicinal Teas & Hylands for when we don't feel well. They have a web sites: www.****.com www.****.com . I hope this helps you. (((HUGS))) hope you feel better fast.
If you really think its something worse... go see a doctor... they can prescribe things to help with the symptoms... but if its just a cold... they cannot cure it
My daughter has this same problem hun. She is always getting sick and it will last for weeks at a time. They have to give her 2 to 3 different kinds of antibiotics before they find the right one that works. Sometimes her Doctor even has to make her take it longer than the usual. She was on it 14 days before and was ok for about 1 month and was sickk again. If I were you I would ask your doctor for another anitbiotic to try and maybe see if he will give it to you a little longer than normal. If that doesnt work hun then maybe you should get your allergies checked.