Confused with hpt tests


I took 3 tests this morning using same fmu that I collected. First test I wasn’t sure of as test line was close to control line

So I took another test to see whether that would give me a different outcome

But thinking the tests may not be correct I took a different brand but still a cheapie test

However after about 20-30 mins that line has completely disappeared to showing a neg now. I read all results within time frame. The strips had sensitivity of 10 the pink test had sensitivity of 20.

So I went to boots to buy a frer but they had sold out so bought their own brand 5 days early test sensitivity of 15 and got a bfn. What do u all think?

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