hello all
Last night I began to experience severe muscle spasms in my mid back, on the right side, obviously this made it hard to breathe, but I was able to bring the spasms under control at the time with heat, and was able to take a percocet, and fall asleep. Today when I woke the discomfort was still there, but more easily managed, I spasms stop if I lie on my back on right side, with my back being the more effective means to control things. I'm also noticing "rumbling" sound on my right side when I breathe but its not in my lungs but it feels rather near my liver. I am 3 weeks post op for Ankle Surgery (surgery was on the right ankle). I am wondering if I've just managed to aggrovate my back or could this be serious?

thanks in advance!