Faulty positive wondfo?

I took a test tonight just for the heck of it and got a positive. I couldn't believe it so I took a bunch of others with the same cup of urine and they all came up negative. Even other wondfos came back negative. Should I consider myself pregnant or not? The positive wondfo is right under the first response. Photo taken within the time frame for all tests. I'm 10DPO
(Sorry about the mess I was a little frantic and didn't clean up before photo, wanted to snap it before the time frame was over)
Update: Vvfl on the top test that I just noticed
 Edit: wondfo never touched OPK, didn't even take an OPK today