Hi, i took a home pregnancy test and it was positive, went to the doctor and by the first day of my last menstrual period i am about 8 weeks, i have very irregular periods sometimes i get them every month and 2 weeks sometimes a month and 3 weeks, went for an ultrasound and there was no sac in uterus, my counts are at 500 when i went for the ultrasound, what do you advise, i am having no pain no bleading just a little cramping and lots of breats pain. hope everything is ok. i have 1 son and everything with him went ok no problems so i dont really want to worry about it too much. i dont want to wait anymore. i want to be sure.