I've had a lot of severe symptoms such as nausea, dizziness, vomiting, and some of the worst stomach pain I've ever experienced (not centralized to a specific area) over the last 2 months, starting before the last time I had sex. I've had a blood and urine pregnancy test performed at the ER and both came back negative, however it's lingering in my head that I could be pregnant because someone in my life experienced a similar situation- just with no abdominal pain, and her tests returned negative too, until she discovered she was 8.5 weeks along. What do you guys think?