Weird pregnancy test results


Started TTC for our 2nd this last cycle. My cycles usually are 26-28 days, but in July it was 31 days. I took a test 4 days ago negative. Took one last night (before I was going to have wine) and it was positive. Bought more tests and both were negative (Took these tests 30 minutes after the first test). Today is cycle day 30 and no AF (yet). Should I buy pink dye tests? Other thoughts?