LATE PERIOD? EC

I had unprotected sex and he came near my vagina! I was scared some sperm could’ve gotten in so I took EC the next day.

After a week I experienced heavy bleeding for my period length, eg like a second period.

It’s been around 4 weeks, *EDIT: MY PERIOD STILL HASNT COME AND IM GETTING WORRIED*

my period is late and I’m not experiencing any pms symptoms.

I’ve started having hot flushes, mood swings, headaches and fatigue..

Could I be pregnant?