Hi
@Laura1979 and welcome to Bonesmart! Congratulations for entering the world of us bone smarties! Just wanted to share my experience of having posterior THR.
My bed ended up looking like a sea of pillows. I had one really firm one under my op leg just under the knee, with another one under my non op leg under my thigh and between my two legs...kinda under and over the two. Then I had pillows under each arm and two under my head and neck. I know it sounds a bit of overkill, but it really helped me sleep on my back and deterred me from accidentally rolling over in the middle of the night.
Once I got used to it and did some tweaking, it became quite comfortable. Then, once I became confident enough to sleep on my side, I put a couple of pillows against my back and then I put a couple of good firm pillows under my op leg. It'll take a couple of trials to see what works best for you, but I never had any trouble with the pillows slipping out in the middle of the night. Of course, if you're worried, you can always loosely tie the pillows to your op leg with bathrobe belts or something like that. I know that sounds a little ridiculous, but whatever works...right?
You will soon learn there is a lot of improvising during this recovery period. As far as bending is concerned, you can still bend...golfers style. That is, bend with your good leg and stretch your op leg out behind you. Just make sure there is something to grab hold of for balance and stability. And once your OS puts you back on full weight bearing, your recovery will start speeding right along. Just be patient and remember to keep icing and rest. Here's hoping for the best for you.
Oh...and I went out to dinner a lot, but just always carried a pillow or little decorative sofa pillow with me, just in case the restaurant seats/booths were too low.