Our DS had the HepB at birth and to be honest I don't think he was really aware. All babies get the Vitamin K needle (I think that is what it is) at birth anyway. In our case I watched as he had the needles and he didn't cry, just looked around and pulled his heal away. I think if you refuse it though they have to accept it. If your really worried about being pressured let your support person/people know so if you are really unwell/tired etc they can be your voice and let the nursing staff know what you want for your bub. Maybe write it down for them before hand so it can go on a file or something.