I'm about 19 weeks and 5 days pregnant. Due date of October 2, 2014.... When did I get pregnant?

Conception. Conception calculators and other tools are available all over the internet. You do not need to wonder about these things anymore. Every possible answer is on the web. Here is a great place to start: http://www.babymed.com/conception-calculator. Sex for your pregnancy occurred 1/4/2014 to 1/9/2014.