Any pregnancy pillow to recommend?

Hi, I’m a first time mom here. I’m having an issue with sleeping on my side. Not use to it as I’m a back sleeper all these while. My back really aches from sleeping on side and I tend to sleep on my back which is not good for baby. Tried putting pillow or bolster at the back as support but it didn’t really help much. Just wondering if there’s any pregnancy pillow to recommend and where can I get it? Thank you in advance!