ARGH! Today i keep getting pains in my back, as if I have tried to lift something too heavy, kind of crampy and stabby at the same time. Don't think they are contractions, and they seem different to the normal pain I get (I have a trapped nerve in my leg which causes pain practically everywhere). For some reason it feels like if I found a good position to sit/stretch in, it would be better. The pain is kind of along my lower spine. I have some codeine prescribed to me, but the doctor told me only to use it as a last resort. Any suggestions? The pains are getting more severe each time, and I'm not doing anything to provoke them.