Help!

I used first response last night and it was negative.

I have 4 days until AF is supposed to arrive and it is said that at 4 days it’s 76% accuracy.

I did drink a lot of fluids and eat right before the test so I tell myself that with that and with testing at night that I could still have a chance.

I just feel like since I used the “6 days sooner” test that I would of still been accurate. I keep going back and forth to myself.

Has anyone used a first response 4 days before expected period and got a BFN but later got a BFP?