K.T.
I had sciatica as well as pubic bone pain. For me it went away seemingly right after giving birth but my memory is a little fuzzy now [I swear I still have "mommy brain" even two years later!].
You shouldn't have to go on bed rest, even though you might wish you could! I remember having a terrible time walking, lifting up my legs, getting out of the car and rolling over in bed- I can't say anything really helped me besides using 6 or 7 pillows to get comfortable in bed and trying not to move. I think I took Tylenol on a couple of occasions but that doesn't do much either. Just remember, it sucks for now, but it will almost surely go away... if not right after labor, then at least when your hormones get back to normal.