DELAYED PERIOD OR AM I PREGNANT?

Me and my partner had sex last Aug. 29-31 (once or twice on the said date.) he didnt cum inside me as he pulled out each time. The day after which was september 1 until september 7 i had a brownish discharge that turned red on the 6th and 7th day.

Now I am 5 days delayed from my period. Am I just stressed or i could possibly be pregnant?

Thanks.