1 positive 3 negitive WTF

we have been trying for 6 years to get pregnant after our first son with no luck, late last night I was in the store and just thought what the heck let's try a digital test came home and took it and bam after a ridiculously long waiting period it comes up pregnant I got so excited and called my best friend I took the end test from the box it said Not pregnant :( umm ok so I chalked it up to being I just went n I basically forced urine out that maybe it wasn't enough to get a good read so I waited till this morning n took 2 at once and both came back not pregnant. any advice or words of encouragement I know I'm not dreaming up the PREGNANT test but 3 Not pregnant test our killing me