Hoping its just very early hun. I needed an u/s to find out how far I was this time, but my gp refused to let me have it done until the BT results showed I was at least 8 weeks. She didn't want me going through the same anxieties you are at the moment. Not much can be seen before then.
Don't stress just yet. Amazing things can happen

ETA - sorry my post says anxieties twice....I can't fix it! Its only there once in edit!!! I'm confused, lol!