Positive blood test after IVF

I never thought I would get to write this, but I just spoke to the clinic -and our IVF worked. I'm just in total shock! 5 days after the embryo transfer I had a bleed and it felt heavier than implantation spotting...then it went away...came back...went away again. I just assumed it failed to implant! Obviously I'm now paranoid it will just be a chemical pregnancy. It's been 4 loooong years of trying and being on the rollercoaster of fertility treatment. Roll on the first scan. Keeping my fingers and toes crossed that this baby sticks! Baby dust to all xxx