Okay so on July 1st I had sex with someone without a condom(this wasnt the first time so I wasn't worried). Well July 2nd I found out my bestfriend died so I've been all emotional and stressed out over all of that. Well on July 4th I was supposed to start my period but when I didn't for a couple of days I just figured it was cause I was so stressed out. Well now I'm like 9 days late. But I've been on birth control and then I missed my shot so I was off of it for a month and got my new shot like a little over a week before I had sex. The first time I was put on it I didn't have my period for a month. So should I be worried if I'm pregnant? Or does anyone think it's stress or the birth control?