Could i be pregnant???

So my period was supposed to start today. All yesterday I was so exhausted I slept the entire day had a stomach ache at like 11 pm by 1am I went to bathroom an had a lil pink (spotting I guess) however at like 8am I went to bathroom no sign of any spotting. Here it is 1pm an still nothing. My period was on time last month however I had sex on my period one day an he pulled out then a week after we had sex a couple times an only one time did not pull out in enough time I know I was ovulating that week. What r my chances of being pregnant? Is it possible to get prey on your period or did I get pregnant the week after?