Sleep help!

I have been sleeping on the couch most nights cause I can't sleep in my bed with this bump! I think it's mostly because before the bump I always slept on my stomach and I can't do that now obviously so I try to sleep on side and I have so much trouble falling asleep that way. I don't think I'm ready to spend money on a pregnancy pillow just yet cause I hear that's mostly for back support and I'm not having that issue just yet. I do try to sleep with a pillow in between my knees and hope it helps. Still struggling.