freaking out! all positives now negative!

Dana
Ladies! On Monday I took a test and got my positive. I have never been so happy in my life. That day and since then I have taken atleast a test a day and all positive. This morning I got up and took a dollar store test this time ( all I had left) and negative, then when I wiped, there was a little blood! 
I am freaking out. What is going on?