I don't think you should over-think anything. As long as you're not actually hurting anybody or think you might be about to, I don't think that those thoughts are too abnormal. If you are concerned about yourself I suggest talking to somebody (professional) about it. I don't really believe that mental health professionals are good for anything other than being a good, impartial person who will listen to you and maybe even reassure you, but that can be a big help!