Positive test then negative and still pregnant?

Jessica
I am going to post my examples okay i took strips, night before and morning after with FMU
Here.. Both VFL
 And then i took a real Dollar store test! 
Here are results! (Some time after) 
Then took a clearblue that same day and got a negative 
Here.. 
And today after that i took two the next morning with FMU. (Today) white one and purple housrs after! 
 White was with FMU and has a VFL!  Then the purple after totally neg!! Im so confused but i want this so bad! 
Here..
I am wondering if this has happened to anyone and they are still pregnant? 

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