Late by 2 days im never late...

So i tested 3 days ago and got a faint positive on a blue dye i know they aren't reliable however im now 2days late ive tested since then on a pink dye and its negative just looks like a evap on most of the strips. I have a clear blue test coming today i know i know blue dye but its all i could get my question is if this test comes out negative do i asume that im definitely not pregnant and not bother to test again? Thank you for your time 🤞