Pregnancy pillow dilemma

I am 22 weeks and already uncomfortable sleeping. My dilemma is, I don’t know which pillow to get to help with sleeping? It’s not like we can try them out to see which one works for us. They are so expensive but I figure it will be worth it. I just don’t want to get the wrong one. I don’t like anything touching my stomach. I’ve been rolling from side to side each night, using regular pillows to prop but it just isn’t working for me. I wake up so many times because my arm is numb. I’m not comfortable.

The U shaped pillow. Is the long part supposed to go against your back or can you lie facing it?

The C shaped pillow. Do you find that you use both sides when sleeping?