Doctor or Midwife?

I'm 5 weeks tomorrow. today I saw a midwife she did my pap, blood work and set me up to have an ultrasound April 2nd. I don't really love the hospital she delivers at also their ultrasounds don't come out very clear and are done at the hospital which is frustrating but is that a reason to switch to a doctor? If I switch to my sisters ob/gyn I'll deliver at a better hospital but I'm kinda upset cause I did my blood work today and will have to re do it I hate needles! Also this is my third baby.