About OCD treatment. Obliged to you.

Dear Sir/Mam, I suffered a traumatic experience in my life ( sprinkle of urine get pour upon feets) because of the structure of the bathroom provided to me in my hostel and lack of mindfulness during those circumstances and the situation to do study by folding legs just at a little bit distance from books , copies , pen, pencils and other study materials . Meanwhile with the passage of time I developed the mindset that my bottom most part of legs are contaminated and generalised the condition on other people as well , my psychologist advised me to apply the method of situation escape ( to do urination in sit down position) but I developed expectations from other people to pour water after doing urination . I still doing study from staying away from home and using common/ share bathroom .The feeling of anxiety develops in mind when someone do urination and forget to pour water. Sir, please suggest a remedy how to cope up this mentality. For this I shall be highly obliged to you.