Pregnancy Odds? WIthdrawal Method

[daydreamer12345]

I'm trying to figure out my odds that I could be pregnant.

First day of last period was July 4th. On July 20th I had unprotected sex. He withdrew, but we had been drinking so I can't remember how early he withdrew. 3-5 minutes later we started to have sex again. I am pretty sure he did not urinate between sessions. We probably had sex 5-10 minutes, and stopped before he finished. I usually have a 28 day cycle. THe lasts few months I've been pretty stressed and I've heard that stress can delay ovulation. 
3 1/2 days later I had a bit of spotting which lasted maybe a day.
I've been semi sensitive to smells, and was pretty tired today. Also I've been going to the bathroom a lot more too. I can't figure out if its potentially super early symptoms or I'm paranoid. 

Any thoughts?

[Milk8shake]

Can't give you any odds, but I'd be inclined to take a test if I were you.  

[Kaydove]

I think the odds favor pregnant. Test!

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