I have a friend who is saying that she is 3 weeks pregnant. She has gotton tested three time(all three times were blood) She went to the ER two night ago and through an ultrasound while in the ER they told her that she was about three weeks pregnant. They told her the reason that the blood results are coming back negative due to the medication that she is on. I think that she is lying to get her ex boyfriend back. Can she be lying or is this possible.