Welcome to HCM,
You have written that you have not done intercourse this month until the 22nd day, which means you have done intercourse after 22nd day. It should be clear to you that in a 28 days regular cycle, ovulation generally takes place on 14th day. Because your cycle vary from 26 to 29 days, ovulation can occur between 12th to 15th day. Further I want to tell you that it is certain that next period will start on 14th day after ovulation, but it is not certain that next ovulation will take place on 14th day of first day of menstrual period. thus if ovulation is delayed due to any reason & you do unprotected intercourse
during that, you can become pregnant. You should get the pregnancy
test done & take decision according to result.
I hope that you will find this information useful.
Wish you good health,