Disappearing BFP?!?! What the heck?!

Hey everyone! I am 14dpo today! :) I took a wondfo, and then ran to let the dogs out. Came back after about two minutes and it was a clear bfp! I was shocked! Both the control line and the test line were there, and were pink! I took a step away because I was losing my cool, and in the time it took to cut a banana and return to the bathroom- it was gone. I'm so sad! Has this ever happened to anyone? (Here's the after picture)