Am I pregnant

I was just wondering if there is any chance that I might be pregnant. All I have been experienced is swollen feet but not tender breast. I have also has some nausea. I am on 19 dpo. So I don't know when I ovulated because it said that I started my fertile window started the day after my af which was July 26 and it also said that af was due August 10. Then when the 10th got here I did not start but it would of been 30 days on the 18th of this month and I still have not started. What are my chances of being pregnant this month? Please help me.