Irregular, unpredictable bleeding like this for a cycle or two after an i-Pill is common. It works by disrupting your usual hormonal pattern, so bleeding timing and flow often stay erratic for a cycle or two afterward, and the cramping with it is a typical side effect too.
Next Steps
Since it's been over two weeks since your last
pregnancy test and you've had ongoing bleeding and pain since, repeat a urine pregnancy test now and see a gynaecologist for a pelvic ultrasound. This rules out other causes, such as a cyst, and confirms things are settling as expected.
Health Tips
Go in sooner if the pain becomes severe, you soak through a pad within an hour, or you feel dizzy or faint.