I Am Currently Almost 40weeks Pregnant & Noticed In Late

I am currently almost 40weeks pregnant & noticed in late afternoon today my left gland under my ear and on my jaw bone is swollen & extremely sensitive to the touch. It seems to have only intensified in the last 5hrs. Should I be alarmed enough to call my midwives? I have upped my vit. c intake with oral vitamins & have drunken echinacea tea.