as a nurse, I can tell you, you have every right to ask for a different midwife to attend you and they HAVE to accomodate you if it is at all possible. Personality clashes happen and no-one takes it personally (well they don't if they are professional and grounded). Be sure to speak up hon as being tense will only make the labour harder to get thru for you.....Def speak to the sister in charge of which ever shift is on when you go in. And goodluck!