would it be spotting or my period?

I had sex on the 23 of Dec then again on the 17 of Jan and also on the 22 ..my period was supposed to come on the 25 it came on the 24 well I think it's my period it's really light which is unusual since I'm a heavy flow ..it's been light since yesterday and I'm m still light rn? should I wait to see if it gets heavy or should I test?