Yesterday positive clearblue. Today is negative 🤔 still no period. IUD Inside. Calling doctor tomorrow

Did you use FMU with the first one? Digitals are very sensitive so that could be why you got a not pregnant the second time. Definitely ask for a blood test ASAP, esp since you have an IUD
I THINK it's PRETTY rare to get a false positive. False negatives, yes, but rarely a false poaitive. Good luck girl!
WHAT in the world is goin on??!! You need to get in to that doc STAT girl!
Your urine could be diluted. It's really rare to grt a false positive pregnancy test. You should definitely get answers when you see your doctor.