Ct scan 17 weeks pregnant

Tara
Hi, has anyone had to or know anyone that has had to get a CT scan on their abdomen while pregnant? I had to get one done yesterday because they thought I had appendicitis. I had no choice but to get it. I am so worried about the risk of the radiation exposure to the baby. It's all I have been thinking about. Any advice? Comments? Or concerns? Please I've been reading stuff on the Internet and it just gives me graphs that don't make much sense.