hi all! i was last sexually active in november 2015. I have not missed any periods, but they have been a bit lighter and shorter in duration... starting in January, I was having severe stomach pains and went to the ER.. they did an ultrasound (vaginal and abdominal) and diagnosed me with a cyst on my ovaries and gallbladder complications. I got my gallbladder removed and am still having pains.. I went back to the ER for pelvic pains and they did another exam, saying that the cyst got bigger... I have now had a total of 3 (internal and abdominal) ultrasounds at what would be 11 weeks, 13 weeks and 15 weeks of pregnancy (if I am even pregnant...) Would it be possible to miss a baby/fetus on ultrasound in the second trimester? most likely, i am not pregnant, but I am trying to figure out what the problem is... thank you all for your help.