Hello, I'd like to help you with your question.
From the sound of it, you may have Kleptomania. Kleptomania occurs when someone steals things that they do not need and that may not have very little value. The motivation appears to be the excitement of stealing and the pleasure felt from getting away with taking something.
Kleptomania is thought of as an impulse control disorder. It is hard to stop even when you want to because the "reward" is a feeling of excitement and pleasure. It can become addicting.
Most people who have Kleptomania feel shame and embarrassment regarding their actions. They may want help but feel too bad about what they are doing to seek therapy. These feelings keep them from seeking help and since they have trouble with controlling the stealing on their own, the cycle of shame and stealing continues.
Although the cause of Kleptomania is not known, it is thought that the pleasure center of the brain is stimulated when the person steals. This causes an addiction type behavior response.
Therapy and medication can help treat Kleptomania. But before you decide to see a therapist, it may help to be checked out by your doctor. You want to be sure there is no physical reasons for what you feel. Once your doctor clears you, then you can ask for a referral to a therapist. Or you can search on line at http://therapists.psychologytoday.com/rms/
You may also want to learn more about Kleptomania so you can help yourself. Here are some resources:
Stop Me Because I Can't Stop Myself : Taking Control of Impulsive Behavior by Jon Grant, S.W. Kim and Gregory Fricchionehttp://health.howstuffworks.com/mental-health/mental-disorders/kleptomania.htm
I hope this has helped you,