H E L P

So I got a positive pregnancy test on Jan. 5th, and according to Glow, I ovulated on the 26th of December. Which would make me right at 10 weeks & 2 days. I am pretty sure I logged everything correctly. Well today was my very first ultrasound, and absolutely nothing showed up on my U/S. They did a regular ultrasound and vaginally. They told me that more than likely I am miscarrying and I just haven't bleed yet. So they told me to go do blood work, to check my hCG levels. I called an hour later and said my levels were at 20,000. And with that being said, something should of shown up on my U/S. I go in Monday for another blood test to again check my levels. If they go up to 50,000 they are going to rule my pregnancy viable but have no reason as to why they couldn't see anything. If they go down, or even stay around the same they are ruling my pregnancy nonviable. I will go in for another ultrasound Friday the 1st, no matter the levels on Monday. And like I said, they are preparing me for a miscarriage.

But as anyone else had this happen before, and everything turn out just fine???