I've been having heaps of siatic pain with this pregnancy since early on
I have short hot showers and that helps, laying down for an hour or so (which is hard with a 10mth old.
I have also consulted with and Osteopath and he said he could help me and he wouldn't crack my back just manipulate it
So u have options out there. I was told deep heat and tiger balm and stuff like that isn't the best idea when pregnant but thats just the advice I got given maybe ask ur dr or midwife on ur next appt