Today I had pain come up in my neck on the left side in the back, accompanied with (or caused by) a really sore gland in my throat on the front left side. The pain seems to be related and it's been the same for about 6 hours now, so I have started worrying that it could be somethig serious like meningitus. How do I know when I should call a doctor? How can I not panic - would I know if I have meningitus before it's too late?