is this normal?

so i’ve had my period like any other normal person, mine usually being late by a bunch of days, but this flow is different? my flows start heaviest on my first and sometimes second day (i wear the lightest pad available so they aren’t that crazy) and they proceed to calm down, but today when i got mine it’s different? it’s late as usual, but it’s very light. almost as if i’m spotting, the color seems very dark when it’s usually a lighter color, but it almost seems black? i dont think it’s anything serious but does this mean anything? i’m quite young and have had my period for a year and a half now, and i’m just wondering if maybe this is happening because i’m not eating healthy or something like that.