Could I be pregnant still?

I am 2 days away from AF. And I normally have really bad PMS with bad depression and cramps. This time neither of the above but have extremely tender boobs which isn't a normal symptom I have. I took a blue dye test 2 days ago with a BFN and then I took a pink dye test today after lunch with again a BFN. Just wondering if I should go to the shop and stock up on AF supplies or get another test.

Baby dust to all.

And thank you in advance.

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