Even when you are sleeping, it's not a deep sleep. There are several things you can try that may make sleep a bit more comfortable. Nice soft pillows to support your belly or to comfort your back, or just to snuggle with. Have a snack before going to bed, but avoid anything spicy or gassy. Try some relaxation techniques or listen to relaxing music.
Meditation is also beneficial.
Yoga and deep breathing are great sleep aids. Keep the yoga simple with slow easy stretches. No need for anything strenuous. Many herbal teas are relaxing and also good for your digestion. If you can talk hubby or some other family member or a friend into it, a massage with warm, sweet smelling oil induces relaxation and sleep.