How many tests did you take?

So I may be slightly insane but I have taken more hpt than I know what to do with. I took my first test on Friday and it was positive. I then chugged some water and took two more, both negative. My husband reassured me that I was probably diluting my urine and it was not accurate. I have since gotten 5 BFP and I am still not convinced!! How many did it take until you believed it?!