After two days late and now I have light period not unlike my regular period.could it be I'm pregnant or is this a sign of pregnancy?

Okay first of all, pregnant and signs of pregnancy are the same thing. Sometimes periods are irregular, arriving early or late due to change in body weight or diet. This also causes them to vary from light to heavy. Take a pregnancy test and/or go see your doctor. I doubt you are pregnant.

I will agree, to most women two days is not "late" periods give or take a week is more "normal"

But if you start with a very light period for a couple days and then it stops, yes that is SOMETIMES a sign, and other times not, That is an issue with signs, they are also signs for dozens of other things also.