P.S. The Behavior Therapy that helped me the most was stopping the compulsions. So, make yourself stop doing whatever you compulsively want to do to "prevent pregnancy" (buying things, self-harm) and try to reassure yourself with rational thoughts that you are not pregnant and distract yourself. I also take Xanax when I'm really anxious due to obsessive thoughts. At first, stopping the compulsions will make you feel more anxious, but gradually, you will feel more in control and the obsessions will get more quiet and you will feel more peaceful. You need a therapist who knows about this method and can help you with it. Best wishes!!