Sleeping positions

Who else having a hard time sleeping and getting the comfortable sleeping position? I am almost 36 weeks pregnant and I’m having trouble in sleeping in my left side. I can’t breathe well and I feel pain at my belly. Before, I tried to sleep in my right side instead and it works for me. But now, I can feel pain on my pelvis and abdomen too. I am aware that we cannot really sleep by laying flat our back. My doctor said I should really try to sleep at my left side, but I really can’t with this pain. Now, I am trying to sleep sitting at the edge of my bed, with pillows that support my back and sides. I am always sleepy trying to have a good rest. :(