Am I or aren't I? Stupid HPTs!

RR • Together since 2009 | Married since 2014 | 3 M/C`s | MTHFR | Rainbow baby born 07/02/17💗 #2 Due 12/21/20!!
Going to the Dr today for blood work but I wanted to see what the weeks estimator would say and its said Not Pregnant! But last nights FIrst Response digital said Yes + 
 
I've had two miscarriages and I'm just so terrified of another. 
Has this ever happened to anyone else?