Any mamas have any relief methods for lower back pain? Ive had it for a while but it hasn’t bothered me for months until…

Any mamas have any relief methods for lower back pain? Ive had it for a while but it hasn’t bothered me for months until my son stepped on my lower back trying to climb on me and now, a month later I went to bend to pull my pants up and something spiked in my back and it hurts to even walk.. I have taken ibuprofen, Tylenol, tried heating pads, and Bengay. I don’t have insurance so doctors are out of the question unfortunately. Anything helps!