Hi welcome to the health care magic Here if seems to be upper respiratory tract infection like bronchitis and post nasal drip... Eustachian tube edema sometime in cold can lead dizziness... Your Auscultation should be done and rhinoscopy nose examination done... If rales heard on Auscultation than chest x ray needed You can prescribed decongestant like phenylephrine antihistaminic drug... Investigate with CBC... If high neutrophils with total count more than antibiotic prescribed If eosinophils are high than fexofenedine course prescribed Take care Consult otorhinolaryngologist or physician for examination..