Don't worry la. I had the same experienced. Two doctors said that I may 宮外孕 as they can't find anything at the first three weeks. But I am now 6 months pregnant la.
Just wait for another week and then check with the doctor.
I was pregnant 1 month ago but now lost it 小產....... :-( . What should I do now? Anyone can give me some advise?
I experienced 小產 (also 1 month after pregnant) before. Several months later, I pregnant again and I have one child now. However, it happened again. I am so disappointed and sad.