Hi, I m pregnant and had constant bad stomach pain last week (mostly in the right lower abdomen) and was admitted to hospital. There was no bleeding, and ectopic pregnancy and appendicitis were ruled out but they found I had a very small ovarian cyst (3.7mm diameter). I m still experiencing pain on and off but it is not as bad as it was when I wnt to hospital and I am managing it with pain killers, but not taking them that much. Anyway, an ultrasound and a transvaginal ultrasound was done (4 wks, 6 days pregnant) and they found an interuterine gestational sac with no embryonic pole or yolk sac. Is this normal? When would I expect the embryonic pole or yolk sac to develop? This is my first pregnancy and I m just paranoid something is wrong because of the pains I have been getting.