Hi Lisa,
Love your hair!!
I used to front sleep as well and find it seems uncomfortable now after surgery, although I'm not sure what the problem is for me... I spend a lot of time wrestling with a pillow at night trying to locate it someplace that will enable me to be a bit more comfy for a few more hours -- maybe you've tried this as well.
I wondered if your son has one of those Wii game console set ups? A few years ago we got one for our family for Christmas and now I am finding it helpful to do some of the activities on the Wii Fit game for my hip. It has yoga stretches, and some other very simplistic types of activities and some are balance related which enables me to see how I may be favoring one leg over the other. It also has a hula hoop activity which helps to stretch all those hip and low back related muscles. I can't hula hoop in real life again yet, but can do it on the Wii. Any way, if you have this game system think about getting the Wii Fit game to use when your psoas is feeling more settled.
Have a good day,
Cardie