So Far, So Good

My second beta came back at 115 today. It has doubled since Friday. Again, the nurse seemed happy with this, so why am I still so worried????? I go back in on Friday for one more beta check. I want to be happy, but I'm so scared right now. Why can't I be one of those lucky fertile people? Will this always hang over me? I just hope I can get through the next few weeks without falling apart. Please let this work out.