Obtrusive thoughts are related to anxiety. You can acknowledge that they are simply obstrusive thoughts and this is all that they are. They are only thoughts, they do not control you. Don't let them squeeze you into a corner and make you feel that you are trapped because you aren't trapped. You have space and choices. If you can recognize that they are being caused by the anxiety then you might be able to feel bigger then they are.

Are you working on your anxiety?