Hi I've been using the Jabra BT150 headset for a couple of days now and notice that everytime I use it I get a slight headache. I never use it for more than a couple hours at a time. I'm not sure if it's just me or if the headset is actually contributing to these headaches but it seems that it only develops as I use the headset. Could it be possible? This is the first headset I have ever used so I can't compare it with any other. Anybody else with similar experiences?