I've had a stabbing pain in my head, behind my ear since Monday. I had it before a few months ago but I don't think it lasted this long. It's a sharp nipping kind of pain that sometimes makes me jerk like as if is poking a nerve. On Monday it was happening maybe once an hour or so but it has increased in frequency science then and it's coming in bursts between 10-30 seconds apart then nothing for about 10 minutes then same again. I've been taking paracetamol since Monday but i don't think it's having any effect anymore.