Confused but hopeful...

I got the Kyleena iud removed September 29, 2020, and I got what I hope/thought was a period October 2-October 5, 2020.

Had some light flow/spotting (would’ve been a waste of a pad) through October 7, 2020.

My predicted fertile window on this app and 2 others was October 12-16 (give or take a day on either end). I wasn’t paying attention and had unprotected sex on the 14th.

I (and potential baby’s father) wouldn’t mind being pregnant, but I’m just not sure if I could get pregnant THAT fast after iud removal.

How likely is it for me to be pregnant? If it is likely, when could I test and get accurate results??