3 weeks clear blue, 5 week? bleeding?

Had really bad cramps, says 3 weeks on clear blue but I've heard it means 5 weeks.. Why is this?! 
Plus I have had some bleeding, went to the doctors midwife won't see me till 8 weeks.
Went to a clinic told me to go to A&E..
However the bleeding has stopped and it just cramps at the moment.

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors