Can Exercise Make Sciatica or Posterior Pelvic Pain While Pregnant Worse?

I had an adjustment today at the chiropractor which may help with some aching I am having directly in the middle of my buttocks. But I had read this is likely posterior pelvic pain and not sciatica and that I should not do things like stairs. **So can exercise worsen this condition? **Can I do [...] http://bit.ly/qkWmSd