suffering from severe lower back pain. what is the best solution for this pain.

try hot water bag

Take rest sit with a support to your back with a pillow and sleep only on your left

thanks prithvi but it's very difficult to sleep all night on left side. trying my best.

thanks Nidhi will definitely try it.

Focus on correcting your posture, use a pillow for lower back and a foot stool to elevate feet especially if you sit for long hours. Take permission from your doctor and sign up for a Prenatal exercise class to learn back exercises.