hard time sleeping on left side!!!

Does anyone else have a lot of difficulty laying on their left side?! I get a lot of leg cramps and shooting pains and just like the what to expect book, he says that I should always try to sleep on my left side to increase blood flow to myself and the baby.  However, it is honestly extremely uncomfortable and often even painful for me to lay on my left side... even when I use a lot of pillows. It's just recently started to become more uncomfortable on my back due to the fact that I am not also 8 months pregnant. The only overall comfy position is my right side. Should I be concerned or am I just overthinking this? I'm concerned about the blood flow to the baby and to increase my blood flow to my legs but it's so uncomfortable!