Mama, please check with your OB muna about this, 26 weeks is a sensitive time and what works for one pregnancy might not be safe for another, kaya importante talaga ang medical advice.
A few of us moms have tried different things to help with matress positioning, but honestly, your doctor is the best person to guide you on what's safe at this stage ng pregnancy. Wag mag-worry, marami pang options na pwede i-discuss ninyo together!