Alright. So the beginning of July I had sex. 2 weeks later I got my period. It was 5 days of the worst bleeding I've had in months due to changing my birth control to a progestin only pill a little less than a month before. Now, 6 weeks later my period is about 5 days late. And I'm not really sure if it's possible to be pregnant? I'm cramping and my body is doing the thing where it tries to push out blood, there is just no blood coming out. I did just recently start a night shift job, about three weeks ago where I work 8 hours 11-7 then sleep all day if possible. But I'm not sure what's going on. Any ideas??