What syndrome is this called if it is a syndrome please healp

I will lock my car before going to the house but while in the house watching TV something will tell me that I did not lock the car and I am sure that I locked the car but to verify I find myself opening the door and going to the garage to check if indeed I locked, Or sometimes to go and check if I really pulled the hand break. Am I very carefull or just sick?

Obsessive-compulsive disorder (OCD) is a psychiatric disorder most commonly characterized by a subject's obsessive, distressing, intrusive thoughts and related compulsions (tasks or "rituals") which attempt to neutralize the obsessions. Thus it is an anxiety disorder.

Obsessions are defined by:

Recurrent and persistent thoughts, impulses, or images that are experienced at some time during the disturbance, as intrusive and inappropriate and that cause marked anxiety or distress.

The thoughts, impulses, or images are not simply excessive worries about real-life problems.

The person attempts to ignore or suppress such thoughts, impulses, or images, or to neutralize them with some other thought or action.

The person recognizes that the obsessional thoughts, impulses, or images are a product of his or her own mind, and are not based in reality.

The tendency to haggle over small details that the viewer is unable to fix or change in any way. This begins a mental pre-occupation with that which is inevitable.

Compulsions are defined by: