A.W.
You can certainly continue to run during your pregnancy. My daughter ran Boston Marathon when she was 6 weeks pregnant and had found a sports Gyn MD on line who advised her to make sure her body temperature didn't go above a certain level (sorry I can't remember what that was). She and her husband ran with a thermometer and ducked in to the port-a-loo's along the way to keep check. The result was a beautiful 7 year old grandson who can boast that he has run Boston Marathon!! My daughter ran until her 8th month during that and her second pregnancy with only positive effects. Of course it is important to 'listen' to your own body and to have your own doctor's OK.
Good Luck and keep on running!