Period or possibly pregnant?

Emily

So I usually have pretty heavy periods with cramps, backaches the whole shebang, that last about 3-4 days. However, this month my period was basically non existent. It lasted a day and a half but EXTREMELY light, basically non existent. I only used a light tampon the first day and a panty liner the second, But totally could’ve just did the liner both days. I took a test today (2 days after what should’ve been my period) and it was negative. Should I test again in a week or two? My “period” was 3 days early. I’m super tired and get kind of nauseous after eating but don’t know if that’s from basically not getting a period.