So confused just found out I'm pregnant?

Kar
I found out I am pregnant today on 11/27/14. I have downloaded several apps and some are saying I am 5 weeks along and some are saying I'm 9 weeks. My last period was on 10/23/14. I'm confused as to why several apps are saying 2 different weeks. Can any one explain this to me?

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