Okay so I had sex about 2/3 weeks ago and I was expecting my period yesterday. A couple of days ago I noticed the veins in my breasts were more noticeable than usual, I became very moody, I can all of a sudden smell dogs everywhere and I had a bit of nausea. Also I usually get cramps a couple of days before my period is due but they never came. So yesterday, when I was expecting my period, I went to the bathroom and found a light brown discharge. I got none throughout the night but I've been spotting this brown discharge all day and it looks like it is going to turn pink. But it is nowhere near as heavy as a period and it doesn't even full one pad. What do you think this is and what do you think the chances of pregnancy are?