I hope it all works out for you. Definitely, you can have a viable pregnancy not seen on ultrasound because it is too early. That happens all the time. However, your HCG number of 19 seems low. Even if it is early. You'll want that number to be higher for sure at this next reading. Many women do have bleeding during early pregnancy. I'm glad yours isn't heavy and you don't have cramping. Your HCG number does concern me though. Fingers crossed it comes up and all is good. Will you come back and let us know? I had a long TTC journey too and know it is a roller coaster. Hang in there. hugs