Hello, had a scan this morning due to having weak BFP's and aching pains in my lower back and right side. I should be just under 5wks pregnant. The doctor said he couldn't rule out an ectopic pregnancy as nothing could be seen in my uterus only a fluid filled mass near my right overy. They've taken blood today and will again on thurs to see what my hcg is doing. I just wanted to ask has anyone else had an early scan where nothing at all could be seen not even a sac and then gone on to still be pregnant. Could the mass be a cyst and the scan too early, or is the mass more likely to be the ep. Does that make sense I'm not sure, I've read about tube rupture and how dangerous it is and am really worried. Thanks .