I Am Many Worried, I Went To Make Blood Test,

I am many worried, I went to make blood test, nurse clean my vein with spirit and threw one used needle in dustbin and again use that finder on my vein, and took blood and later put cotton with that same finger, My Quention is what happen if blood come on my vein by her finger and then puncture for drawing blood? Sec danger is she use cotton tiny ball with same finger and make band aid without spirit...does it spread HIV?