cramping lower groin area

Today i was rushing to get the bus and in the middle of the way,i started having this pain in my lower groin area.it feels like something is pulling my ovaries on each side.and it hurts a lost when in walk. I am 4 months pregnant and a first time mother.i don't know what to make of this.i called my dr and ge said not to worry,i don't have any bleeding.it is been hurting for ghe last 6/7 hours only when i walk.it is like stretching and pulling and jabbing me.from time to time i get a sharp psin in my vagina. I am really scared.did you ever experience this?