Sayang, I know this is scary especially after what you've been through, but please go see a doctor or do a proper test at a clinic as soon as you can, two weeks late needs checking, even if you're nervous. A few of my mum friends who had irregular periods were also worried, but the doctor helped them figure out what was actually going on, and that peace of mind was worth it. Don't wait any longer lah, okay? Your health comes first.