A few questions regarding spd, ob's, and midwives... 1: what's the difference between an OB, a certified nurse midwife, and an uncertified midwife?

2: I've had spd since week 28 and have not walked much/exercised much and I have had the pain under control. However I'm overdue and started taking long walks about 3 days ago everyday and my spd is brutal again. Is there a way to get some exercise so this baby will drop without upsetting my spd?