Help!

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Okay so my most fertile days were from March 14-16 and we had sex a few times each of those days. My missed period was march 24th. Now today (march 30th) I took two First Response tests and both were an obvious positive. That was earlier today but now I just went to the bathroom and there was blood! 
​What does this mean? 
​Could it be my missed period?
​Was the test wrong?
​Am I really not pregnant? 
​Could this be a miscarriage? 
So many question because I just want answers! We've been TTC for a year now and this started as great news..
​(I added the photo of my tests to show there was no mistake in reading them)