To make sure that your chest infection goes away, you can take Echinaforce from A.Vogel, a very effective antiviral and antibacterial that can safely be combined to cold and flu conventional treatments. This product will help you to fight the infection a lot faster. Since you are already subject to sinus problems, you can keep using it as a preventative during the cold and flu season, to help avoid further episodes.
It is not possible for Sinna to have caused your problem, you can safely keep on taking it. It can be combined to any treatment.
-Drink hot water (ex. Broth and herbal teas), since it help reduce congestion.
-Eat a lot of raw foods; they contain high levels of antioxidants that help the immune system function better.
-Add a lot of onions and garlic to your diet, they help decongest and boost the immune system.
-Avoid food that causes congestion (ex. Dairy products, banana, oat…).
-Eliminate white sugar (reduce efficacy of immune system) and use honey instead.
-In cases of chronic sinusitis, find your food allergies or any other allergy that can irritate the sinus cavities.