Many pregnant women like using a «body pillow,» a very long pillow, sometimes curved, that can be adjusted many ways. (doctor-info.website)
There are also long pillows like carrots or French fries to sleep with. (shelterness.com)
The Luna Lullaby Bosom Baby Nursing Pillow is the largest and longest pillow on the market fit for multiple uses beyond just breastfeeding. (mommyedition.com)