I am a 25-year-old female. I had unprotected sex in July during my fertile window but I had periods on time in July and even in august (but lighter than I usually get it still lasted 4-5 days though). But this month in September my periods seem to have changed from heavy flow to light flow (as I could easily get up on the second day which I usually couldn't but I still needed a pad) my period blood seem to have extremely pale red or brownish colour. It's my third day today but I just needed a panty liner as I had very light bleeding today (usually I need at least one pad for the third day) I don't think I'll have any flow tomorrow. I took dysmen tablet on the first day because of pain (this was the first time I took pain killers for period pain) is this normal period or is there anything to worry about? Could this light flow be because of pain killer I took?