hi ive had pain in the glands behind my ear and under my jaw,ive also had constant head aches and a stiff neck,my doctor said it was an infection in my salivary glands and gave me erythromycin 250g which i took for 7 days 4 times a day,ive finished them now and its still troubling me,could i have a problem with my ears?im also really tired all the time