All my previous health anxiety issues have been based on something that's happened, i.e. my gran's death from mnd or comments from doctors etc but for the first time I've become freaked out without any external influence. I have suddenly become paranoid I have skin cancer. I have no real reason to think I do.... It's all based on two moles.... one of which I've as long as I can remember so about 20 years with no noticeable change (it's still small - about 2mm but it is not perfectly symmetrical or round but like I said there's been no change as long as I've noticed it). And one which is tiny (<1mm) which is pale but may have a tiny white dot on it. But I don't have any large moles and there's no history of skin cancer in my family.
Is this anything to worry about? and how to stop worrying?