About OCD treatment. Developed over it.

Dear Sir, Whenever I think I have to wear full pant throughout the night especially while going in marriage ceremony as a baarati or while travelling in a train which consists night journey I think and the thought arises in my mind that night fall might have occurred and its patches are being created upon it although in reality these events do not get happened , sir its humbly requested to suggest a method to overcome this type of mentality because since past 5 years I have not wear those pants / full jeans pant which I have used for night journey in train or attended marriage ceremony as a baarati because I have the mentality that wearing full pant throughout the night may get in the situation of night fall and its patches may get developed over it.