A friend of mine had cocaine on his table and i put my hand in it when i was gettig up. would it be in my system at all i'm getting worried.

Yes: If you were to test your urine by liquid chromatography/mass spectrometry, it would most certainly show a low level of cocaine metabolite called BZG or benzoylecognine. It would be advisable to not "hang out" with friends who are actively doing cocaine, especially if you have a job that does random drug tests.

Not to worry: cocaine isnt absorbed from the outer skin layer. Any symptoms you're experiencing is anxiety about the episode