Last was awoken by sharp pain in right breast, not heartburn felt more like a growing pain. Then felt sharp pain in right shoulder. Got up took Tylenol, drank water, pain subsided but was left with a dull pain in right arm that has cleared up as of now. Only 6 wks pregnant and read these pains could possibly be signs of an ectopic pregnancy. How likely is this? It is my second pregnancy, and I have no history of miscarriages.