Lay on your back. After a few days mine went away. Avoid bending over or picking anything heavy.
Try soaking in a warm bath with a few drops of smell good essential oil. That always helped my backaches. Also I realized sometimes it was gas lodged in my back so a nice rub down often helped move it along. Good luck.
A warm bath then getting on all four's while hubby masages my back helps I also dip my back while he does so that my lower back will pop