I pricked my finger on a rusty nail. A tiny spec of blood the color of the rust appeared and i then wiped it off and no more blood appeared.  I washed my hands shortly after.  This was 90 minutes ago and aside from anxiety, i am seeing no symptoms of anything.   I do not recall when i last had a tenus shot but i get a physical yearly. Is there any symptom that i should look for before going to an ER?