Spotting or is my period light ?

I started ‘ spotting ‘ 10 days before my period was predicted to come ( according to this app) I thought I was just spotting but it ended up lasting 6 days which I always get my period for 7 days. Also, my period is irregular and is always heavy flow.. so do y’all think it was just my period being light ? Should I be worried in anyway ?

Side note: i don’t know if this is important i had sex for the first times in a year this month ( had it 3 times this month ) Also I’ve been really stressed lately and my anxiety has been pretty bad. Could that be why I got a light period?