Those CB digital tests are awful! I posted something on here last week for the same reason. My last pg ended in mc so I have been very anxious about this one so I figured if I could see a 3+ I would feel better ...
At 5w3 took one (10 days after the first 2-3 I received) and got 2-3 again! I freaked out figured I would mc again for sure, that my levels weren't rising properly etc. And then I read up on it online, SO many women have the same complaints and go on to have healthy babies. They are absolutely not as accurate with dating as they claim (not outside a lab anyway). Every woman and every pregnancy is different, and I truly believe it is a marketing ploy preying on vulnerable and insecure women, because if you get 2-3 again you will feel the NEED to buy more right? ergh! drives me nuts. It been a week since I got my 2-3 and no mc, been to the Dr. and everything looks great.
Basically, ignore it. If you feel super concerned ask your Dr. for a blood test w/ repeat 48 hours later. That will tell you a lot more than those stupid tests and it will be free!