What are the chances I am pregnant?

I had unprotected sex 9 days after my period started, ever sense then I have been wondering what the chances are that I am pregnant? My next period is due today, I started spotting 2 days ago so I was thinking maybe I was starting my period early but then I thought, wait I never spot even when I do start my period. So is it too early for me to check to see if I am pregnant or do I need to wait another week to check? 
Update:
So the spotting is not a constant, so I am not wearing a tampon or anything, only when I urinate and wipe is when I see spotting, i have been bloated for  a couple days and have been moody which is out of my norm. Should I take a test 3 weeks after the date of me last having sex, or should I wait a whole month no know for sure? 

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