Pregnancy pillow

Okay so I'll be 9 weeks Sunday and I've been trying to hard to sleep on my side, but I always move onto my back. I know this is bad, especially starting in the second trimester. So I'm asking you mommas that have been pregnant before, does the pregnancy pillow really work, and help you stay on your side? If so, what's the best brand? Thanks ladies! Hope everyone's pregnancy is going well 😊