1. At CD11 there is no risk to the foetus, because there is no foetus at this point.
2. However, Xrays can cause DNA damage to your ovaries and breasts, so ask them to put a "lead gown" over your pelvis and breasts. They wont ask why, it is pretty standard practice.
Good question. I often work in an operating theatre where lots of Xrays are taken...I have always covered up my girly parts, even though the risk is minimal.