Tri-nessa

I am currently on the pill and there have been days where I forget to take it at the exact time and take it around 2-3 hrs when I get back home... I've been pretty busy with school work and my 5 year old and these past two days I've been feeling nauseated and moody.. Should I wait to take a pregnancy test?? My period is suppose to start in 2 weeks. I think it's stress but I'm not sure. Advise please !!!