What are the chances I’m pregnant?

[Fuckeditup1]

I had my period on the 6th of September it lasted 4 days and I had unprotected sex on the 25th. But I had a period on the 7th of October so thought I wasn’t. apparently you can menstruate and still be pregnant.
what was the earliest I could have taken a pregnancy test to get a result?
I highly doubt I’m pregnant, 99% sure I’m not because of the dates, but should I order one anyway, what are the chances?

very very low!

I wouldn't worry about being pregnant.

The dates are out and you’ve had a period, so very low.
is there a reason you’re worrying about this? Just do a test if it’ll set your mind at ease.