Tiny, yeah, all that and it didn't even take the edge off! I've never taken high doses of Ibuprofen but I hear that can be brutal too.
Sarah, I'm glad you're at least able to do what you need to do around the barn and hopefully enjoy yourself in the process. I'm not sure about the SI joint, but I know riding helps the rest of your back because you're constantly moving so it relieves stiffness. My back always feels SO much better after a good ride. :)