my bf and i trieed to have sex on Jan 17th, he couldnt go inside and he didnt ejaculate at all the whole time. so..technically we didnt have sex since he didnt penetrate me. however, my last period was on Dec 24th and today is Jan 31st and i havent gotten it. i think it might be that since the day we tried ive been freaking out and stressing out about the possibility that i could be pregnant. i read that periods can be irregular because of puberty,weight gain,annd stress and ive had all 3. we didnt use a condom. also i have gotten irregular periods before-like skip a month but get it 2 times the next. but could there be a chance of me being pregnant?