Do I need to have my wisdom teeth pulled?

[Sandy95]

I went to a new dentist to get a check up and a cleaning. He didn’t find any cavities but he said I need to have my wisdom teeth taken out. I was surprised because I already had my wisdom teeth the last time I went to the dentist and my previous dentist said it was not necessary to pull out these teeth if I was not bothered by them and if these teeth are not decayed. My wisdom teeth don’t really bothered me but I feel sometimes pain near my upper wisdom teeth with headache. However, painkillers are quickly helping to manage these pains. I need to confess that I am scared of dentists. Today, I was very nervous when I went to the dentist although I knew it was only to get a check up and a cleaning. The dentist gave me my dental x-ray: http://i.imgur.com/ssSMDl2.jpg. Do I really need to have my wisdom teeth removed?