I've had lower back pain all day, getting worse as it gets towards late afternoon, and I can't think what to do to get rid of it. It's 38 degrees here and I'm so hot already so a heat pack is out of the question! Would it be bad to put a cold pack there? I remember having this last time and it did go away after a couple of days, but then I also didn't have a fat... I mean, heavy 10 month old to carry around!!