Hi Dianne,
Not going to lie, it's going to be uncomfortable for a bit. Lying on your side and, as Alex says, going from one cheek to the other does reduce the discomfort.
The main thing to take away though, if my experience is anything to go by, is that it doesn't last. You'll gradually feel more comfortable, bit by bit, until it's not an issue any more. I'm just over a year post surgery and, whilst I'm always aware that it's there, it doesn't rule my life. I frequently jump in the car and drive a couple hundred miles to a job. Might need a little quiet time afterwards, but it's all good.
I did buy me one of those doughnut shaped cushion things, but I rarely used it, didn't help at all. You'll figure out what's best for you, but take heart in knowing that it does get better.
Best wishes
Rob