Wudhu breaking with a drop of urine

Q:

  1. Someone told me that if only a drop of urine comes out you still have your wudu because a drop is less than a penny (coin), is this true?
  2. All impurity which is less than 3 to 5 centimetres in diameter is excused. I am sure two drops of urine on your clothes will not make a circle which is more than 3 centimetres, is that true?

Sucking blood

Q: I wanted to inquire about the drinking of flowing blood being haraam! If a person checks his sugar, pokes bimself for the blood to be released and
thereafter sucks the remaining blood from his finger, is this constituted as haraam?