RLP and exercising

I am an aerobic instructor and usually I don't have much RLP, but I needed to find a spin sub last night, because it was too painful.  What do you ladies do for RLP and do you still work out when it bothers you?  I have asked the doctor and he says that it can't hurt the baby to work out, only you.  I usually work through the pain, but I am a little more cautious now, of course.  Sometimes I feel better after working out, but spinning is just too much on those tendons.  Any advice is greatly appreciated.  I already drink a lot of water too.