okay so my period is 4 days late. it usually isn't, but i'm also 15. i am sexually active, and have sex usually 3-4 times a week. i'm not on birth control, though we do use condoms every single time and pull out as well. i am not the one who checks them, but my partner does and says every time it doesn't have a leak or break. we also do other things which usually don't get too messy, but i'm still worried. i haven't taken a pregnancy test because i've been worried about purchasing it due to the fact that i am so young. i am also thinking it could be from stress, as i have had a death in the family recently along with school and sports. though, i am feeling nauseous, tired, cramping, have a headache and been hot/cold on and off. i have looked up symptoms online and i do have some of them. do you think i'm pregnant or my period is just late??