'Test Confusion' Honest opinion needed!

Jennie
Hi everyone. I am 3 days before my period is due and had a sudden urge to test. I used a cheap dip test that I have in bulk!! and thought I can see a veerry faint line.. I panicked and went to the shop to get a clear blue digital, this confirmed by thoughts and it said no pregnant (heartbroken) but I can't stop thinking about the dip test, any views or ur experiences with tests appreciated, I can take honesty : ) xx