Back/sacrum pain & sciatica

I encountered severe back/sacrum pain after 2 hard and long cycling workouts. I was able to run but didn't ride. In addition to rest and ice I went to my chiropractor and got adjustment. Over the course of 3 weeks I was starting to feel better then my injury moved to my right side/leg and turned into sciatic pain in my back, SI joint and lower leg. Pain is worse in am. Currently I'm unable to run or ride. I've used the elliptical trainer up to 30 minutes, which feels fine while doing it, but hurts afterwards. I also did some weight lifting to help maintain my strength.  I tried some PT exercises and stretches (previously prescribed by PT for another condition). Has anyone had a similar experience and what can I do or not do to heal faster? I'm very frustrated and in constant pain.