will a pregnancy pillow help?

i'm only 17 weeks but this is my second pregnancy, i've noticed at night i'll wake up and my lower back will be killing me. usually a little while after i get up it gets better. i don't sleep crazy or anything, i only sleep on my sides so will a pregnancy pillow help this? i've also noticed my bones are starting to stretch already as well, my pelvic and tail bone have been hurting especially when i bend down it feels like it's stretching

edit: i already sleep with a longer pillow between my legs as it is