Drop of urine

Dear brother i suffer from ocd. Today there was small drop of urine on the toilet seat i touched it with my hands. My finger got wet but urine on hand was smaller than one dirhm. As i was washing my hand my hands touch the Tap and my jumper sleeve touched the Tap. Does the tap and my jumper became najis. I pour water on sleeve of my jumper and try to ignore the waswasaw. Becuase i thought najis was less than dirhm