Low grade fever from past 20 days.

I am having bouts of low grade fever, upto 99.5°, from past 20 days. Fever comes with breathlessness and fatigue during day time and goes away by night. It has been going from past 20 days. I also experience sharp pain around my left ear, starting from below my tongue and going upto my forehead. I have had typhoid tested thrice and it is negative, blood culture is normal, doctor also advised feretin, vitamin d, lft, kft, urine routine and culture, thyroid, all normall, my cbc test however shows increased lymphocytes, around 4.05 thou/mm3 and eosinophils are low at 0.4% but the local ENT says that is not to worry about and it can be due to some throat infection. I have had a course of augmentin 625 and crocin 650 with a couph syrup for 7 days now but it's not helping anyhow. I am allergic to house dust mites and my serum ige is also elevated. I am having normal apatite and there is no throat pain. Can my problem be due to swelling in lymph nodes? Please help, thanx in advance