It sounds to me like you need to get bloodwork done. You should also try another home pregnancy test. I am actually a bit surprised they did an ultrasound, said it might be a pregnancy, yet didn't test your HCG levels. Once you have missed a period, blood tests and home pregnancy tests should be accurate. I wish you luck, I hope this is a pregnancy!!
They werent a hundred percent sure if it was a baby, and said to wait a few weeks cause if it was it wouldnt show up on a test by the looks of it, I saw it, it was just a little dot. My mom was the tech that did the ultrasound so she told me every little thing she saw.
Well, as much as I respect the ultrasound, HCG appears as soon as an egg implants. HCG levels will double app. every 48 hours in early pregnancy, so a positive will show up in bloodwork before anything can be seen on ultrasound. It is the best way to know for certain at this point. Give your Dr. a call and see if you can't have one. The waiting is the worst and if you are 2 weeks late for your period, I don't think there is anyway the hormone wouldn't show up. Good luck again!!