Shock and excitement turned to sadness and grief

Well my shock and excitement after finding out I was pregnant a couple of days ago was clouded by sadness and grief. I went for a follow up blood test today and the numbers had gone down. After 3 previous miscarriages this year we were so hopeful that we would finally have our rainbow baby. But it doesn't look like that's going to be this one. They are fearing an ectopic pregnancy at this point. I go back in on Sunday for another blood test. I really don't know how to deal with another loss. I don't know how much more of this I can handle. My heart hurts so bad right now.