Women in their 40's TTC or BFP

Tracey
Statistics show that over half of women who are over 40 will experience infertility. Your chances to conceive are only 5%. I am just baffled I got BFP on the first month of tracking my cycle with Glow. I wasn't ttc actively yet as I wanted to be officially engaged and planning a wedding FIRST. 
​What's your story morning glory?