26 weeks and no sleep

I am 26 weeks with my second baby and have recently started sleeping in the recliner due to the bed makes my hips/back/pelvis hurt. My thing is, as tired as I feel, I am having so much trouble sleeping! It takes me forever to fall asleep, then I wake up 2-3 times a night. I feel like a zombie all day, especially chasing after my 2 year old son! Any advice? I didn't have this problem with my first pregnancy.