Read the directions with your panel. All the ones that I have used ALWAYS say that the color of the line is NOT an indication of pass/fail, or closeness to the pass/fail cutoff. A line is a line is a line.

I cant find the exact instructions for my last Amazon pack, but over 95% of samples indicated NO LINE when AT the exact cutoff level, and 100% indicated NO LINE when above it. Immunoassays are pretty darn accurate (save for the EMIT).

Also, Aspirin will do absolutely nothing unless you are subject to an EMIT panel, which is unpopular these days due to high false-positive rates.

IMO best to sub if you are uncertain.