Didn't know I was pregnant!!!

Mariah
So I only use my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> to track my period and the awesome insights it has for me, and I didn't track my ovulation or my bbt anything! We wasn't really trying but if it happened it happened we are an easy going couple! 
So I had surgery yesterday and as they were doing all my pre operation tests they come back to ask me do you think you could be pregnant? 
I was like no I should start my period tomorrow, and the nurse was like well I have 3 positive urine tests for you! So my heart started to go crazy. She then told me she was doing a blood test to double check. And 2 hours later BAM! Here it is I'm expecting!!! Woah this is life changing and I totally didn't know that I was pregnant
Septembers period was really light so I didn't think anything of it! 
But I go dec 4th to check and see how little peanut is doing and how far along I am!