I wish I could help, I had back problems with the first and it was horrible!! They didn't go away till 2 weeks before he was born, that's when he dropped. I tried back rubs, didn't work, heat, didn't work, ice, didn't work, chiro, didn't work. Luckily it was my first so I just layed around not doing much. Are you drinking enough water? Keeping yourself active?

I know how painful it can be.