I have a sore throat, nose congestion, bad taste in mouth and a lump in throat feeling for more then 10 days. Is this a possible sinus infection?

You sound sick. This could be a sinus infection or even the flu. You may require treatment. You need to visit your PMD or consult with one of us on HealthTap.
Sinus infection. Yes it could be. Allergies are bad this time of year and can contribute to the symptoms. This could cause and cough, worse when lying down, facial tenderness, congestion and a fever and headache. See your PCP for treatment if symptoms persist.