Yesterday In My Workplace Someone (Who May Be Hiv Positive)had

Yesterday in my workplace someone (Who may be hiv positive)had some cut on his hand which was bleeding profusely.So he touched first aid kit box for band aid.after 2~3 hours one of my friend touched the same surface.Before he touched the surface was covered by two notebooks(that means almost no air contact). Immediately after touching that surface my friend had given me some amount of tobbaco with his hand that touched that contaminated surface.immediately after taking the tobbaco in mouth and chewing it unknowingly I had some cut in my mouth.i am becoming paranoid.can I become infected?