Thanks for query,
We cannot decide the future date of ovulation by earlier periods.
The ovulation produces ovum can remain live for 2 days & injected sperm can live in body for 3-4 days.
As you have an unprotected sex on ovulation period & then after you have taken after pill lately may not distured your fertilisation process.
Chances of being pregnant is 50-50.
We should wait for at least 30 of this month.
Go for pregnancy
test then after.