Double HGG within 48 hrs, but had classic symptoms of miscar

Boy has it been a Rollercoaster of Emotions. it all started late last week when my best friend emailed me and told me she had some sad news to tell me. She informed me that she had thought she had miscarried a pregnancy. She had heavy bleeding for 10 days, blood clots, cramps, and what she believes was passage of fetal tissue- all the classic symptoms. When she called her OBG YN, they told her to come in asap to get cleaned up to insure she did not have an infection. She had been trying for nearly a year to get pregnant, and had a history of m/c. About two years ago, she had an ovarian cyst that ruptured and caused an infection and lost an ovary and fallopian tube, so she only has one working ovary. Because of that, she was scared of losing the other one and the chance of ever being pregnant. She made an appt. to have a D& C the following day. Well the dr. couldn’t see anything on the ultrasound so he ordered her to have a series of blood test. The second test revealed that she had doubled hgg within the 48 hr. period meaning that there was still a pregnancy. The question is where is it? I have been reading about this, but if I understand properly, her HGG would be not have doubled in 48 hrs. if it was a tubal pregnancy. I don’t know what to say and how to react until she knows for sure what she is dealing with. I am so excited I’m nearly bursting on the inside, but at the same time, I don’t want to get my hopes up that this could be it. I kinda feel cheated to, I would love to have been able to celebrate with her without having to worry so much about her previous situation…although I’m glad she trusted me to help her through what she thought was another m/c. She kept thanking me for being there for her, although I did not know what to say or do to help her through. Her family, aside from her mom, whom she told about the possible m/c after she was pressured, only got the good news part of it, and were able to be excited for her. I know this sounds pretty lame but…this is rough. I told her this stinks, because she should be celebrating instead of having to be happy at the good news, but not getting her hopes to far up. She has to do another blood test tomorrow, so hopefully by then, her numbers will have doubled again. Is there a chance this might still be a tubal pregnancy?? She is still bleeding, although not as heavy as before. She won’t know for sure for another 2 weeks when she goes in for a sonogram.