Non-refundable ticket changes will cost you. As of 2013, Delta charges $150 for changes to domestic tickets and $250 for international tickets. If you booked your Delta flight through a travel agent or an online agency, you will be charged an additional $50 to make any changes to your ticket.
In the U.S., approximately 3.3 million people have OCD, of which you have 0.3 to 1% of pediatric population and 2% of adult population. So about 1 out of 200 adults have OCD and twice as many have had OCD at 1 point or another in their life.
Obsessive compulsive disorder (OCD) is a psychological disorder which causes repetitive behavior. Suffers believe these repetitions will rid them of disturbing thoughts or feelings. It is believed that there are five major types of OCD. Cleaning, hoarding, and repetitive checking are the three most common behaviors.