23 weeks pregnant. cant sleep well.

Hello mommies/ mummy to be. It's that point of time where I cant find a comfortable position to sleep. The most comfortable position is for me to lay on my back but its said that it's not good for the baby. Any recommendations or ideas on how I can get proper sleep? It's to the point I feel like it's affecting my mental well being and everyday tasks aka feeling weak all the time. I envy my hubby who can sleep soundly. T_T