Was your pdoc perhaps suspecting you would talk your husband out of taking you there, change your mind, etc? That happens all the time.

When my son had to be taken to the hospital, they also insisted he be taken by ambulance rather than we try to take him for just that reason. Their concern is he would put up a bit of a fight with us, try to change our mind, cut and run, etc. So far my pdoc has always allowed me to take myself, but trust me, I get the 3rd degree about where my thinking is, and it is very clear his concern is that I will change my mind. So far I never have, but it certainly was in the realm of possibilities and would have been a mistake.