Pregnant or Naw?

Hey ladies.. So judging by the title you all know what this is about. So ive been having unprotected sex since my last period and my period this month is supposed to come today. Usually before it comes, I get like lil cramps in my vagina and I just know my body to where I know it's coming. Well I haven't felt cramps really ... Just wanted to know for those who have ever been pregnant ... The day of your period .. Did you feel like it was coming? Or you just felt regular?